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Консультация № 199559
07.11.2020, 22:54
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Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
На горизонтальном столе лежит доска массой m1 = 1 кг, на которой находится брусок массой m2 = 2 кг. К бруску привязана лёгкая нерастяжимая нить, второй конец которой перекинут через идеальный блок, закреплённый на краю доски. Коэффициент трения между доской и бруском μ = 0,2. Вертикальный участок нити начинают аккуратно нагружать одинаковыми гирьками массами ∆m = 75 г каждая. При каком минимальном количестве n гирек система придёт в движение? Найдите модули и направления ускорений, с которыми в этом случае начнут двигаться доска и брусок. Трением между доской и поверхностью стола можно пренебречь, модуль ускорения свободного падения можно принять равным g = 10 м/с2
На горизонтальном столе лежит доска массой m1 = 1 кг, на которой находится брусок массой m2 = 2 кг. К бруску привязана лёгкая нерастяжимая нить, второй конец которой перекинут через идеальный блок, закреплённый на краю доски. Коэффициент трения между доской и бруском μ = 0,2. Вертикальный участок нити начинают аккуратно нагружать одинаковыми гирьками массами ∆m = 75 г каждая. При каком минимальном количестве n гирек система придёт в движение? Найдите модули и направления ускорений, с которыми в этом случае начнут двигаться доска и брусок. Трением между доской и поверхностью стола можно пренебречь, модуль ускорения свободного падения можно принять равным g = 10 м/с2
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