при подъеме ведра с водой массой m=10 кг на высоту h=1,0 м силой упругости троса была совершена работа A=120 Дж. Равномерно ли поднимали ведро?

при подъеме ведра с водой массой m=10 кг на высоту h=1,0 м силой упругости троса была совершена работа A=120 Дж. Равномерно ли поднимали ведро?
- Предмет:
  Физика
- Автор:
  houdini
- 5 лет назад

Ответы 1

Если сила упругости F_{elast} = mg, то ускорение ведра с водой a = 0. Делаем это предположение. Тогда работа по подъему ведра равна:A^{'} = mgh = 100 Дж \neq A .Т.е. предположение сделано неверно, а, значит ведро поднимали с ускорением, т.е. не равномерно.
- Автор:
  keeshacpss
- 1 год назад
- 4
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The tailor sat down, close over the fire, lamenting: "One-and-twenty buttonholes of cherry-coloured silk! To be finished by noon of Saturday: and this is Tuesday evening. Was it right to let loose those mice, undoubtedly the property of Simpkin? Alack, I am undone, for I have no more twist!"
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при подъеме ведра с водой массой m=10 кг на высоту h=1,0 м силой упругости троса была совершена работа A=120 Дж. Равномерно ли поднимали ведро?

Ответы 1

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