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Консультация № 196775
23.10.2019, 18:11
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Здравствуйте! У меня возникли сложности с таким вопросом. Задачка из Иродова.
Непонятна, когда скорость груза будет максимальной (понятно, что не в конце пути). Стоит ли рассматривать систему как рычаг?
Непонятна, когда скорость груза будет максимальной (понятно, что не в конце пути). Стоит ли рассматривать систему как рычаг?
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Обсуждение
24.10.2019, 10:39
общий
Адресаты:
Вы писали: "Непонятна, когда скорость груза будет максимальной" - а чего тут понимать? Обычное свободное падение груза C под действием силы тяжести, ибо в начальный момент нить хоть и стянута боковыми грузами, но не тянет груз C вверх и НЕ препятствует его падению.
Затем груз C разгоняется. Его скорость возрастает. Прогнувшаяся нить начинает тормозить падение. Наступает момент, когда 2 боковых груза стягивают нить так, что уравновешивают вес груза C. Я полагаю, в этот момент скорость груза максимальна и начинает уменьшаться. Груз C проскакивает состояние равновесия по инерции. А потом возвращается на высоту равновесия с затухающими колебаниями.
"Стоит ли рассматривать систему как рычаг?" - здесь 2 блока, рычагов нет. Система похожа на бельевую верёвку. Вы когда-нибудь анализировали прогибы верёвки с бельём?
Затем груз C разгоняется. Его скорость возрастает. Прогнувшаяся нить начинает тормозить падение. Наступает момент, когда 2 боковых груза стягивают нить так, что уравновешивают вес груза C. Я полагаю, в этот момент скорость груза максимальна и начинает уменьшаться. Груз C проскакивает состояние равновесия по инерции. А потом возвращается на высоту равновесия с затухающими колебаниями.
"Стоит ли рассматривать систему как рычаг?" - здесь 2 блока, рычагов нет. Система похожа на бельевую верёвку. Вы когда-нибудь анализировали прогибы верёвки с бельём?
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