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Консультация № 200623
11.04.2021, 23:05
0.00 руб.
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1
Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
На блок (однородный диск) массой m0 и радиусом R намотана невесомая нерастяжимая нить, к
концу которой привязан груз массой m. В оси блока имеется трение. Найти момент силы
трения, если за время t после начала движения груз опустился на расстояние h.
Срочно.
На блок (однородный диск) массой m0 и радиусом R намотана невесомая нерастяжимая нить, к
концу которой привязан груз массой m. В оси блока имеется трение. Найти момент силы
трения, если за время t после начала движения груз опустился на расстояние h.
Срочно.
Обсуждение
12.04.2021, 08:51
общий
это ответ
Здравствуйте, redkl7!
Предлагаю Вам следующее решение задачи.
Дано:
-- масса диска; 
-- радиус диска; 
-- масса груза, привязанного к концу невесомой нерастяжимой нити, намотанной на диск; 
-- расстояние, на которое опустился груз за время 
с начала движения.
Определить:
-- момент силы трения в оси диска.
Воспользуемся основным уравнением динамики вращательного движения. Проинтегрировав его дважды, получим
(
-- момент инерции диска относительно оси вращения; 
-- угловое ускорение диска),
(
-- скорость груза в момент времени ),
Ответ:
Предлагаю Вам следующее решение задачи.
Дано:
-- масса диска; -- радиус диска; -- масса груза, привязанного к концу невесомой нерастяжимой нити, намотанной на диск; -- расстояние, на которое опустился груз за время с начала движения.Определить:
-- момент силы трения в оси диска.Воспользуемся основным уравнением динамики вращательного движения. Проинтегрировав его дважды, получим
(
-- момент инерции диска относительно оси вращения; -- угловое ускорение диска),(
-- скорость груза в момент времени ),Ответ:
Об авторе:
Facta loquuntur.
Facta loquuntur.
Форма ответа
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