Предмет: Физика, автор: lavrentiy45687

Камінь кинутий вертикально зі швидкістю 10 м/с. На якій висоті його швидкість
зменшиться вдвічі?
Срочно, но не копируйте с другого ответа. там плохо

Ответы

Автор ответа: Cohendd
1

Дано: Vo=10 м/с; V=5 м/с; h - ?

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h=(V²-Vo²)/(-2g)

h=(5²-10²)/(-20)=3,75 м  -  это ответ.

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

ИЛИ

По закону сохранения механической энергии:

Екин1=Екин2+Епот

mV²/2=m(V/2)²/2 + mgh

10²/2=5²/2 + 10h

10h=100/2 - 25/2

10h=75/2

h=75/20

h=3,75 м  -  это ответ.

Cohendd: Можно через закон сохранения энергии. Сделать?
lavrentiy45687: дададада подалуйстааааа
lavrentiy45687: Вы не могли бы еще сделать 2 послкдних задания у меня в профиле?? я там норм баллов дал. очень надо просто
lavrentiy45687: пожалуйста
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