Ящики из цеха на склад транспортируются по желобу транспортера длиной 30 м и углом наклона 30 градусов. весь путь ящик проходит за 6 секунд. определить коэффициент трения между ящиком и желобом, минимальный угол наклона желоба, при котором возможна транспортирование ящиков (угол трения)
Russia569
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22.11.2019 20:22
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