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La chute libre des corps
Matériel didactique : Tableau noir,craies blanches
Objectif opérationnel : A l’issue de la leçon, les élèves seront capables de l’effet de la pesanteur, les lois des grandeurs

Rappel

Quelle est l’expression de l’espace total en MRUR ?

Rappel

et= e0 +v0.t= at2

Motivation

Quel constant faites-vous lorsque le prof relâche la craie par la main ?

Motivation

La craie tombe pour retrouver le centre  de la terre avec une certaine vitesse.

Annonce du sujet

Qu'allons nous étudier aujourd'hui

Annonce du sujet

Aujourd'hui nous allons étudier la chute  libre des corps 

Développement

Chute libre des corps

Définition : tout corps tombe est attiré vers le centre de la terre c’est l’attraction universelle. Cette attraction est une droite verticale qui joint le corps au centre de la terre.

Lois des accélérations : Elle est constante notée par « G » obtenue par l’action de pesanteur sur une masse constante.

g= 9,81 m/s2

Lois des vitesses : la vitesse varie en fonction du temps. 

Vt=g.t (m/s)

Lois des espaces : quand il s’agit d’une chute, on parlera plus de la hauteur.

Que vaut la hauteur en chute libre

En MRUV 

Synthèse de la leçon 

La chute libre n’est que l’application du MRUV.

MessagesTimelineExceptionsViews7RouteQueries40Models54GateSessionRequest
8.1.28PHP Version159msRequest Duration6MBMemory UsageGET lessons/{id}/{slug}Route
    • Booting (36.87ms)
    • Application (122ms)
    • 1 x Application (76.71%)
      121.62ms
      1 x Booting (23.25%)
      36.87ms
      7 templates were rendered
      • public.lessons.show (resources/views/public/lessons/show.blade.php)2bladefile
        Params
        0
        lesson
        1
        lessons
      • components.banner-page (resources/views/components/banner-page.blade.php)7bladefile
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        0
        property
        1
        firstTitle
        2
        secondTitle
        3
        src
        4
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        5
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        6
        __laravel_slots
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        summary
        1
        title
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        actionText
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        6
        __laravel_slots
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        1
        title
        2
        href
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        attributes
        4
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        5
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        Params
        0
        __env
        1
        app
        2
        errors
        3
        lesson
        4
        lessons
        5
        component
        6
        __currentLoopData
        7
        lesson_
        8
        loop
        9
        section
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        __env
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        app
        2
        errors
        3
        lesson
        4
        lessons
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        6
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        7
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        8
        loop
        9
        section
      • layouts.include.public.footer (resources/views/layouts/include/public/footer.blade.php)10bladefile
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        __env
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        app
        2
        errors
        3
        lesson
        4
        lessons
        5
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        6
        __currentLoopData
        7
        lesson_
        8
        loop
        9
        section
      uri
      GET lessons/{id}/{slug}
      middleware
      web
      controller
      App\Http\Controllers\Public\LessonController@show
      as
      public.lesson.show
      namespace
      prefix
      /lessons
      where
      file
      app/Http/Controllers/Public/LessonController.php:86-138
      40 statements were executed73.62ms
      schoolap
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        • 20. /app/Http/Controllers/Public/LessonController.php:95
        • 21. /vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 22. /vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 23. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
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        • 17. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
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        • 18. /vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
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        • 40. /vendor/laravel/framework/src/Illuminate/View/View.php:195
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        • 39. /vendor/laravel/framework/src/Illuminate/View/Engines/CompilerEngine.php:70
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