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Консультация № 200763
29.04.2021, 15:22
0.00 руб.
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Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
Диск радиуса R начинает вращаться из состояния покоя в горизонтальной плоскости вокруг оси Z, проходящей перпендикулярно его плоскости через его центр. Зависимость проекции углового ускорения от времени показана на графике. Во сколько раз отличаются величины тангенциальных ускорений точки на краю диска в моменты времени t1 = 2 с и t2 = 7 с?
а) в 2 раза б) в 4 раза в) оба равны нулю г) трудно определить точно
Диск радиуса R начинает вращаться из состояния покоя в горизонтальной плоскости вокруг оси Z, проходящей перпендикулярно его плоскости через его центр. Зависимость проекции углового ускорения от времени показана на графике. Во сколько раз отличаются величины тангенциальных ускорений точки на краю диска в моменты времени t1 = 2 с и t2 = 7 с?
а) в 2 раза б) в 4 раза в) оба равны нулю г) трудно определить точно
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Обсуждение
01.05.2021, 07:43
общий
01.05.2021, 07:46
это ответ
Здравствуйте, Дмитрий!
Предлагаю Вам следующее решение задачи.
Дано:
-- радиус диска; график зависимости проекции углового ускорения диска от времени.
Определить: во сколько раз отличаются величины тангенциальных ускорений точки на краю диска в моменты времени
с и 
с.
Из заданного графика видно, что абсолютные величины угловых ускорений диска в рассматриваемые моменты времени составляют
с-2 и 
с-2. Поэтому 
То есть величины тангенциальных ускорений точки на краю диска в моменты времени с и с отличаются в четыре раза.
Ответ: величины тангенциальных ускорений точки на краю диска в моменты времени с и с отличаются в четыре раза.
Предлагаю Вам следующее решение задачи.
Дано:
-- радиус диска; график зависимости проекции углового ускорения диска от времени.Определить: во сколько раз отличаются величины тангенциальных ускорений точки на краю диска в моменты времени
с и с.Решение
Из заданного графика видно, что абсолютные величины угловых ускорений диска в рассматриваемые моменты времени составляют
с-2 и с-2. Поэтому То есть величины тангенциальных ускорений точки на краю диска в моменты времени с и с отличаются в четыре раза.Ответ: величины тангенциальных ускорений точки на краю диска в моменты времени
с и с отличаются в четыре раза.
5
Об авторе:
Facta loquuntur.
Facta loquuntur.
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