Предмет: Физика, автор: beru9

Как определить направления силы натяжения и ускорения. Очень прошу помочь. Завтра контрольная и ничего не понимаю

Приложения:

Ответы

Автор ответа: кайф1945

Ответ:

Ускорение ты сам направляешь(ось ставь),натяжение нити всегда вверх направленно( когда вертикально)

Объяснение:

beru9: Это от этого не зависит

Автор ответа: fatt52

Ответ:

Объяснение:

Смотри рисунок. Тело 3 тянет все остальные...

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Приложения:

beru9: А как вы это определили? Просто хочется знать сам алгоритм

fatt52: 1 и 2 тело лежат на столе. Тело 3 висит на нити и тянет всё вниз. Через блок нитка тянет и тела 1,2... Тело 1 находится последним и натяжение будет меньше (если массы одинаковые)

beru9: А как оно может тянуть. Если масса третьего меньше чем сумма 1 и 2

fatt52: Но оно же (3) свободно висит! И тянет всё вниз.

fatt52: Если сила трения 1 и 2 небольшая, то они начнут двигаться вправо.

beru9: Спасибо

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