Предмет: Физика, автор: vladok031

Какую силу надо приложить, чтобы поднять мраморную плиту под водой? Объём плиты 0,015 м3.

Ответы

Автор ответа: sundetamanjol

F = mg - pgV
Масса не дана, значит надо выразить ее через плотность и объём :
m=p/V
Подставим в формулу изначальную :
F=(p/V)*g-pgV =(2700 кг м3/0,015 м3 )* 10 - 1000 * 10 * 0,015 м3 = 12000Н=12кН

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