Предмет: Физика, автор: Evgen2008lazarev

6. КПД наклонной плоскости 75%. Какую работу нужно совершить, чтобы груз массой 100кг поднять на высоту 7,5м?

Ответы

Автор ответа: zinovicgrigorij

2

Ответ: 10кДж

Объяснение:

Дано:

η=75%=0,7

m=100кг

h=7,5м

g=10Н/кг

-------------

Аз-?

η=Ап/Аз

Аз=Ап/η=mgh/η=100*10*7,5/0,75=10000Дж=10кДж

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