Предмет: Физика, автор: 7ник7

какая сила тяжести действует на медный брусок размерами 10*8*5 см

Ответы

Автор ответа: ужнеужели
0

На любое тело на Земле действует сила тяжести F=ma, где m - масса тела, g - ускорение свободного падения примерно равное 10 м/с^2

Масса тела зависит от плотности и объема m= ρV

Плотность меди ρ = 8900 кг/м^3,

объем V = 10*8*5 = 400 см^3 = 0,0004 м^3

Тогда масса m = 8900 кг/м^3 * 0,0004 м^3 = 3,56 кг

Значит сила тяжести F = 3,56 кг * 10 м/с^2 = 35,6 Н

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