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Люстра высотой 2 метра и массой 30 кг стоит на полу зала. Какую работу надо совершить,чтобы поднятьее к потолку,если высота зал 10 м?
Ответы 1
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A=F*SF=mgрасстояние равно 8 метрам, так сила тяжести действует из центра тела,а так как длина равна 2, то центр тела находится на высоте 1 метрA=30*10*8A=2400 Дж
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Автор:
kiersten - 6 лет назад
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