Страница 19 - гдз по физике 9 класс учебник Кабардин

Физика, 9 класс Учебник, автор: Кабардин Олег Фёдорович, издательство Просвещение, Москва, 2014, радужного цвета

Авторы: Кабардин О. Ф.

Тип: Учебник

Серия: архимед

Издательство: Просвещение

Год издания: 2014 - 2026

Цвет обложки: радужный

ISBN: 978-5-09-034177-6

Cтраница 19

App\Models\BookPage {#1003 // resources/views/models/book_page/default.blade.php
  #connection: "mysql"
  #table: "book_pages"
  #primaryKey: "id"
  #keyType: "int"
  +incrementing: true
  #with: []
  #withCount: []
  +preventsLazyLoading: false
  #perPage: 15
  +exists: true
  +wasRecentlyCreated: false
  #escapeWhenCastingToString: false
  #attributes: array:21 [
    "id" => 1717325
    "created_at" => "2026-04-10 00:54:11"
    "updated_at" => null
    "field_page_start" => "19"
    "field_url" => "/9-klass/fizika/kabardin-uchebnik/page-19"
    "field_display_title" => "19"
    "field_folder" => "1"
    "field_image_name" => "19"
    "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1008
      #items: []
      #escapeWhenCastingToString: false
    }
    "field_weight" => "0"
    "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1038
      #items: array:1 [
        0 => App\Models\Book {#1006
          #connection: "mysql"
          #table: "books"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: false
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            "id" => 862
            "created_at" => "2026-04-10 00:54:11"
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                0 => App\Models\Term {#1007
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                    "updated_at" => null
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                  ]
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                    "updated_at" => null
                    "name" => "Физика"
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                    "field_cases" => array:6 [ …6]
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                    "field_translit" => "fizika"
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            "field_class" => Illuminate\Database\Eloquent\Collection {#1010
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                    "created_at" => "2026-04-10 00:54:11"
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                    "field_patronymic" => "Фёдорович"
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                  ]
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                  ]
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              ]
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            "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1016
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                  #connection: "mysql"
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                    "field_plural_form" => null
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                    "field_translit" => "uchebnik"
                  ]
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              ]
              #escapeWhenCastingToString: false
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            "field_country" => Illuminate\Database\Eloquent\Collection {#1019
              #items: array:1 [
                0 => App\Models\Term {#1020
                  #connection: "mysql"
                  #table: "terms"
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                    "id" => 9
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "name" => "Россия"
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                    "field_translit" => "rossiya"
                  ]
                  #original: array:6 [
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                    "name" => "Россия"
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                    "field_translit" => "rossiya"
                  ]
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            "field_city" => Illuminate\Database\Eloquent\Collection {#1021
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                  #connection: "mysql"
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                    "name" => "Москва"
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                    "field_translit" => "moskva"
                  ]
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              #items: array:1 [
                0 => App\Models\Term {#1024
                  #connection: "mysql"
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            "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1026
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              #items: array:1 [
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                  #connection: "mysql"
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            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1065
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1101
              #items: array:1 [
                0 => App\Models\Branch {#1064
                  #connection: "mysql"
                  #table: "branches"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:23 [
                    "id" => 1716713
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "field_display_title" => "Законы механического движения"
                    "field_branch_order" => null
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1068 …2}
                    "field_page_start" => "12"
                    "field_branch_display" => "0"
                    "field_branch_expanded" => "0"
                    "field_display_branch_in_title" => "1"
                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "field_branch_cover" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1067 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1098 …2}
                  ]
                  #original: array:23 [
                    "id" => 1716713
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "field_display_title" => "Законы механического движения"
                    "field_branch_order" => null
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1068 …2}
                    "field_page_start" => "12"
                    "field_branch_display" => "0"
                    "field_branch_expanded" => "0"
                    "field_display_branch_in_title" => "1"
                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "field_branch_cover" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1067 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1098 …2}
                  ]
                  #changes: []
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                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
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                  #dispatchesEvents: []
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                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1134
              #items: array:3 [
                0 => App\Models\Branch {#1144
                  #connection: "mysql"
                  #table: "branches"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:23 [
                    "id" => 1716713
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "field_display_title" => "Законы механического движения"
                    "field_branch_order" => null
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1145 …2}
                    "field_page_start" => "12"
                    "field_branch_display" => "0"
                    "field_branch_expanded" => "0"
                    "field_display_branch_in_title" => "1"
                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "field_branch_cover" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1146 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1147 …2}
                  ]
                  #original: array:23 [
                    "id" => 1716713
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "field_display_title" => "Законы механического движения"
                    "field_branch_order" => null
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1145 …2}
                    "field_page_start" => "12"
                    "field_branch_display" => "0"
                    "field_branch_expanded" => "0"
                    "field_display_branch_in_title" => "1"
                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "field_branch_cover" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1146 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1147 …2}
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
                1 => App\Models\Branch {#1148
                  #connection: "mysql"
                  #table: "branches"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:23 [
                    "id" => 1716718
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "field_display_title" => "Мгновенная скорость. Ускорение"
                    "field_branch_order" => "3"
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1152 …2}
                    "field_page_start" => "16"
                    "field_branch_display" => "0"
                    "field_branch_expanded" => "0"
                    "field_display_branch_in_title" => "1"
                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "field_branch_cover" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1151 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1150 …2}
                  ]
                  #original: array:23 [
                    "id" => 1716718
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "field_display_title" => "Мгновенная скорость. Ускорение"
                    "field_branch_order" => "3"
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1152 …2}
                    "field_page_start" => "16"
                    "field_branch_display" => "0"
                    "field_branch_expanded" => "0"
                    "field_display_branch_in_title" => "1"
                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "field_branch_cover" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1151 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1150 …2}
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
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                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
                2 => App\Models\Branch {#1153
                  #connection: "mysql"
                  #table: "branches"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:23 [
                    "id" => 1716720
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "field_display_title" => "Задачи"
                    "field_branch_order" => null
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1154 …2}
                    "field_page_start" => "17"
                    "field_branch_display" => "0"
                    "field_branch_expanded" => "0"
                    "field_display_branch_in_title" => "1"
                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "field_branch_cover" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1155 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1164 …2}
                  ]
                  #original: array:23 [
                    "id" => 1716720
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "field_display_title" => "Задачи"
                    "field_branch_order" => null
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1154 …2}
                    "field_page_start" => "17"
                    "field_branch_display" => "0"
                    "field_branch_expanded" => "0"
                    "field_display_branch_in_title" => "1"
                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "field_branch_cover" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1155 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1164 …2}
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
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                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1127
              #items: array:1 [
                0 => App\Models\Element {#1128
                  #connection: "mysql"
                  #table: "elements"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:7 [
                    "id" => 1859740
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#1126 …2}
                    "task" => array:2 [ …2]
                    "text" => "<p><strong>Задача 3.4.</strong> При торможении перед светофором автомобиль двигался равноускоренно и прямолинейно с ускорением $3 \text{ м/с}^2$. Сколько времени прошло от момента начала торможения до остановки автомобиля, если скорость автомобиля в момент начала торможения была равна $108 \text{ км/ч}$? С какой скоростью двигался автомобиль через $5 \text{ с}$ после начала торможения?</p>"
                    "img" => array:1 [ …1]
                  ]
                  #original: array:7 [
                    "id" => 1859740
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#1126 …2}
                    "task" => array:2 [ …2]
                    "text" => "<p><strong>Задача 3.4.</strong> При торможении перед светофором автомобиль двигался равноускоренно и прямолинейно с ускорением $3 \text{ м/с}^2$. Сколько времени прошло от момента начала торможения до остановки автомобиля, если скорость автомобиля в момент начала торможения была равна $108 \text{ км/ч}$? С какой скоростью двигался автомобиль через $5 \text{ с}$ после начала торможения?</p>"
                    "img" => array:1 [ …1]
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1716876"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1716874"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1099
              #items: array:1 [
                0 => App\Models\Book {#1006}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1717325"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1716875
            "created_at" => "2026-04-10 00:54:11"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/kabardin-uchebnik/zad03-4"
            "field_display_title" => "3.4"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1066}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1065}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1101}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1134}
            "content" => Illuminate\Database\Eloquent\Collection {#1127}
            "next" => array:2 [
              "refs" => "1716876"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1716874"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1099}
            "page" => array:2 [
              "refs" => "1717325"
              "type" => "book_page"
            ]
          ]
          #changes: []
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          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
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          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        1 => App\Models\Task {#1132
          #connection: "mysql"
          #table: "tasks"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1716876
            "created_at" => "2026-04-10 00:54:11"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/kabardin-uchebnik/zad03-5"
            "field_display_title" => "3.5"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1141
              #items: array:1 [
                0 => App\Models\Term {#1063}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1130
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1100
              #items: array:1 [
                0 => App\Models\Branch {#1144}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1131
              #items: array:3 [
                0 => App\Models\Branch {#1144}
                1 => App\Models\Branch {#1148}
                2 => App\Models\Branch {#1153}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1118
              #items: array:1 [
                0 => App\Models\Element {#1117
                  #connection: "mysql"
                  #table: "elements"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:7 [
                    "id" => 1859741
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#1115 …2}
                    "task" => array:2 [ …2]
                    "text" => "<p><strong>Задача 3.5.</strong> По графику (рис. 3.10) определите вид движения и напишите формулу, выражающую зависимость модуля скорости от времени.</p>"
                    "img" => array:2 [ …2]
                  ]
                  #original: array:7 [
                    "id" => 1859741
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#1115 …2}
                    "task" => array:2 [ …2]
                    "text" => "<p><strong>Задача 3.5.</strong> По графику (рис. 3.10) определите вид движения и напишите формулу, выражающую зависимость модуля скорости от времени.</p>"
                    "img" => array:2 [ …2]
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1716877"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1716875"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1125
              #items: array:1 [
                0 => App\Models\Book {#1006}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1717325"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1716876
            "created_at" => "2026-04-10 00:54:11"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/kabardin-uchebnik/zad03-5"
            "field_display_title" => "3.5"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1141}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1130}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1100}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1131}
            "content" => Illuminate\Database\Eloquent\Collection {#1118}
            "next" => array:2 [
              "refs" => "1716877"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1716875"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1125}
            "page" => array:2 [
              "refs" => "1717325"
              "type" => "book_page"
            ]
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        2 => App\Models\Task {#1123
          #connection: "mysql"
          #table: "tasks"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1716877
            "created_at" => "2026-04-10 00:54:11"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/kabardin-uchebnik/zad03-6"
            "field_display_title" => "3.6"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1103
              #items: array:1 [
                0 => App\Models\Term {#1063}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1121
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1124
              #items: array:1 [
                0 => App\Models\Branch {#1144}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1119
              #items: array:3 [
                0 => App\Models\Branch {#1144}
                1 => App\Models\Branch {#1148}
                2 => App\Models\Branch {#1153}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1106
              #items: array:1 [
                0 => App\Models\Element {#1109
                  #connection: "mysql"
                  #table: "elements"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:7 [
                    "id" => 1859742
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#1107 …2}
                    "task" => array:2 [ …2]
                    "text" => "<p><strong>Задача 3.6.</strong> По графику (рис. 3.11) определите вид движения и напишите формулу, выражающую зависимость модуля скорости от времени.</p>"
                    "img" => array:2 [ …2]
                  ]
                  #original: array:7 [
                    "id" => 1859742
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#1107 …2}
                    "task" => array:2 [ …2]
                    "text" => "<p><strong>Задача 3.6.</strong> По графику (рис. 3.11) определите вид движения и напишите формулу, выражающую зависимость модуля скорости от времени.</p>"
                    "img" => array:2 [ …2]
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1716878"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1716876"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1116
              #items: array:1 [
                0 => App\Models\Book {#1006}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1717325"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1716877
            "created_at" => "2026-04-10 00:54:11"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/kabardin-uchebnik/zad03-6"
            "field_display_title" => "3.6"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1103}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1121}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1124}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1119}
            "content" => Illuminate\Database\Eloquent\Collection {#1106}
            "next" => array:2 [
              "refs" => "1716878"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1716876"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1116}
            "page" => array:2 [
              "refs" => "1717325"
              "type" => "book_page"
            ]
          ]
          #changes: []
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          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
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          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        3 => App\Models\Task {#1113
          #connection: "mysql"
          #table: "tasks"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1716878
            "created_at" => "2026-04-10 00:54:11"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/kabardin-uchebnik/zad03-7"
            "field_display_title" => "3.7"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1122
              #items: array:1 [
                0 => App\Models\Term {#1063}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1110
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1114
              #items: array:1 [
                0 => App\Models\Branch {#1144}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1111
              #items: array:3 [
                0 => App\Models\Branch {#1144}
                1 => App\Models\Branch {#1148}
                2 => App\Models\Branch {#1153}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1136
              #items: array:1 [
                0 => App\Models\Element {#1138
                  #connection: "mysql"
                  #table: "elements"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:7 [
                    "id" => 1859743
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#1139 …2}
                    "task" => array:2 [ …2]
                    "text" => "<p><strong>Задача 3.7.</strong> Постройте график зависимости модуля скорости автомобиля от времени, если он из состояния покоя движется равноускоренно и прямолинейно и через 10 с его скорость становится равной 40 м/с.</p>"
                    "img" => array:1 [ …1]
                  ]
                  #original: array:7 [
                    "id" => 1859743
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#1139 …2}
                    "task" => array:2 [ …2]
                    "text" => "<p><strong>Задача 3.7.</strong> Постройте график зависимости модуля скорости автомобиля от времени, если он из состояния покоя движется равноускоренно и прямолинейно и через 10 с его скорость становится равной 40 м/с.</p>"
                    "img" => array:1 [ …1]
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1716879"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1716877"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1104
              #items: array:1 [
                0 => App\Models\Book {#1006}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1717325"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1716878
            "created_at" => "2026-04-10 00:54:11"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/kabardin-uchebnik/zad03-7"
            "field_display_title" => "3.7"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1122}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1110}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1114}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1111}
            "content" => Illuminate\Database\Eloquent\Collection {#1136}
            "next" => array:2 [
              "refs" => "1716879"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1716877"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1104}
            "page" => array:2 [
              "refs" => "1717325"
              "type" => "book_page"
            ]
          ]
          #changes: []
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          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
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          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        4 => App\Models\Task {#1105
          #connection: "mysql"
          #table: "tasks"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1716879
            "created_at" => "2026-04-10 00:54:11"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/kabardin-uchebnik/zad03-8"
            "field_display_title" => "3.8"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1112
              #items: array:1 [
                0 => App\Models\Term {#1063}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1133
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1102
              #items: array:1 [
                0 => App\Models\Branch {#1144}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1140
              #items: array:3 [
                0 => App\Models\Branch {#1144}
                1 => App\Models\Branch {#1148}
                2 => App\Models\Branch {#1153}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1169
              #items: array:1 [
                0 => App\Models\Element {#1168
                  #connection: "mysql"
                  #table: "elements"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:7 [
                    "id" => 1859744
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#1170 …2}
                    "task" => array:2 [ …2]
                    "text" => "<p><strong>Задача 3.8.</strong> По условию задачи 3.2 постройте график зависимости модуля скорости поезда от времени.</p>"
                    "img" => array:1 [ …1]
                  ]
                  #original: array:7 [
                    "id" => 1859744
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#1170 …2}
                    "task" => array:2 [ …2]
                    "text" => "<p><strong>Задача 3.8.</strong> По условию задачи 3.2 постройте график зависимости модуля скорости поезда от времени.</p>"
                    "img" => array:1 [ …1]
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1716880"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1716878"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1137
              #items: array:1 [
                0 => App\Models\Book {#1006}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1717325"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1716879
            "created_at" => "2026-04-10 00:54:11"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/kabardin-uchebnik/zad03-8"
            "field_display_title" => "3.8"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1112}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1133}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1102}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1140}
            "content" => Illuminate\Database\Eloquent\Collection {#1169}
            "next" => array:2 [
              "refs" => "1716880"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1716878"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1137}
            "page" => array:2 [
              "refs" => "1717325"
              "type" => "book_page"
            ]
          ]
          #changes: []
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          #attributeCastCache: []
          #dateFormat: null
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          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        5 => App\Models\Task {#1157
          #connection: "mysql"
          #table: "tasks"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1716880
            "created_at" => "2026-04-10 00:54:11"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/kabardin-uchebnik/zad03-9"
            "field_display_title" => "3.9"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1135
              #items: array:1 [
                0 => App\Models\Term {#1063}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1158
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1156
              #items: array:1 [
                0 => App\Models\Branch {#1144}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1161
              #items: array:3 [
                0 => App\Models\Branch {#1144}
                1 => App\Models\Branch {#1148}
                2 => App\Models\Branch {#1153}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1179
              #items: array:1 [
                0 => App\Models\Element {#1178
                  #connection: "mysql"
                  #table: "elements"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:7 [
                    "id" => 1859745
                    "created_at" => "2026-04-10 00:54:11"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#1180 …2}
                    "task" => array:2 [ …2]
                    "text" => "<p><strong>Задача 3.9.</strong> При торможении перед светофором автомобиль двигался равноускоренно и прямолинейно с ускорением $4 \text{ м/с}^2$. С какой скоростью двигался автомобиль через 10 с после момента начала торможения, если скорость автомобиля в момент начала торможения была равна $72 \text{ км/ч}$?</p>"
                    "img" => array:1 [ …1]
                  ]
                  #original: array:7 [
                    "id" => 1859745
                    "created_at" => "2026-04-10 00:54:11"
                     …5
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
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                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1716881"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1716879"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1171
              #items: array:1 [
                0 => App\Models\Book {#1006}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1717325"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1716880
            "created_at" => "2026-04-10 00:54:11"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/kabardin-uchebnik/zad03-9"
            "field_display_title" => "3.9"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1135}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1158}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1156}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1161}
            "content" => Illuminate\Database\Eloquent\Collection {#1179}
            "next" => array:2 [
              "refs" => "1716881"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1716879"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1171}
            "page" => array:2 [
              "refs" => "1717325"
              "type" => "book_page"
            ]
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
      ]
      #escapeWhenCastingToString: false
    }
  ]
  #original: array:21 [
    "id" => 1717325
    "created_at" => "2026-04-10 00:54:11"
    "updated_at" => null
    "field_page_start" => "19"
    "field_url" => "/9-klass/fizika/kabardin-uchebnik/page-19"
    "field_display_title" => "19"
    "field_folder" => "1"
    "field_image_name" => "19"
    "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1008}
    "field_weight" => "0"
    "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1038}
    "field_metatags_title" => null
    "field_metatags_description" => null
    "field_h1" => null
    "field_description_top" => null
    "field_description_bottom" => null
    "edition_groups" => Illuminate\Database\Eloquent\Collection {#1036}
    "content" => Illuminate\Database\Eloquent\Collection {#1047}
    "next" => array:2 [
      "refs" => "1717326"
      "type" => "book_page"
    ]
    "previous" => array:2 [
      "refs" => "1717324"
      "type" => "book_page"
    ]
    "tasks" => Illuminate\Database\Eloquent\Collection {#1040}
  ]
  #changes: []
  #casts: []
  #classCastCache: []
  #attributeCastCache: []
  #dateFormat: null
  #appends: []
  #dispatchesEvents: []
  #observables: []
  #relations: []
  #touches: []
  +timestamps: true
  +usesUniqueIds: false
  #hidden: []
  #visible: []
  #fillable: []
  #guarded: array:1 [
    0 => "*"
  ]
}
Физика, 9 класс Учебник, автор: Кабардин Олег Фёдорович, издательство Просвещение, Москва, 2014, радужного цвета, страница 19
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