Предмет: Физика, автор: nastyapod93

задачка лёгкая. Я не успеваю по времени, прошу помощи. ​

Приложения:

Ответы

Автор ответа: zinovicgrigorij
1

Ответ: 58м/с

Объяснение:

Дано:

t=7с

V=12м/с

g=10м/с²

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

Vo-?

При свободном падении скорость тела находим по формуле:

V=gt1, где:

g-ускорение свободного падения;

t-время падения тела.

Отсюда:

Время падения тела до преобретения им скорости 12м/с равно:

t1=V/g=12/10=1,2с

Значит тело поднималось вверх:

t2=t-t1=7-1,2=5,8с

Время подъема тела находим по формуле:

t2=Vo/g, где:

Vo-начальная скорость тела;

g-ускорение свободного падения.

Тогда:

Vo=g*t2=10*5,8=58м/с


nastyapod93: Написало, что не правильно (
zinovicgrigorij: Исправил.
nastyapod93: спасибо большое
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