Предмет: Физика, автор: dennis99999

С помощью неподвижного блока поднимают груз массой 50кг прикладывая силу 600Н.Каков КПД этого блока?

Ответы

Автор ответа: Tipok228

Полезная работа равна приращению потенциальной энергии груза, затраченная - работе приложенной силы:
An = m*g*h
Aз = F * h
кпд = An / Aз = m*g / F = 50*10 / 600 = 5/6 ~ 0,83

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