Предмет: Физика, автор: DimaTukhar

Помогите будьте - добры! Даю 40 баллов

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Ответы

Автор ответа: vpterwerty

1)
Дано:
Ep=6 Дж
h=1,2м
g=10 H/кг
m-?
Ep=mgh
m=Ep/gh=6/10*1,2=6/12=1/2=0,5 кг
2)Дано:
m=50кг
v=3м/с
E-?
Ep=315Дж
E=Ep+Ek
Ek=mv^2/2=50*3^2/2=50*9/2=450/2=225Дж
E=Ep+Ek=315+225=540Дж

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