Предмет: Физика, автор: sevakov41

1)Какой потенциальной энергией относительно земли обладает тело массой 500г на высоте 400см?
2)Потенциальная энергия тела массой 20 кг, поднятого над землей равна 1кДж. На какой высоте находится тело?
3)Какой кинетической энергией будет обладать пуля, если ее скорость при вылете из ружья равна 600м/с, а масса 9г?
4)Мотоцикл массой 150 кг разогнался из состояния покоя так, что его кинетическая энергия стала 30кДж. До какой скорости разогнался мотоцикл?
СРОЧНО!!

Ответы

Автор ответа: kotodevka

Ответ:

E = m * g * h

m - масса ( 500 кг )

g - ускорение свободного падения ( 10 Н / кг )

h - высота ( 5 м )

E = 500 * 10 * 5 = 25000 Дж = 25 кДж

marmokm282: ...

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