Предмет: Физика, автор: ANONIM228009

Ребзи срочно!!!!помогитеее
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Ответы

Автор ответа: ksusha8889kp
1

Ответ:

2)Емеханічна=Ек+Еп

Еп=mgh

Eп=2.5*10*16=400Дж

Емеханічна=80+400=480Дж

Объяснение:

1)Ек=98 Дж, v= 7 м/с, m-? Eк=mv^2 /2;m=2Ек /v^2 ; m=2*98/7*7=4кг

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