Предмет: Физика, автор: azazellik04

Помогите пожалуйста, 50 баллов.
Бревно тянут за обмотанную вокруг него верёвку, так что скорость веревки равна V. Бревно катится не проскальзывая. С какой скоростью движется бревно?

Ответы

Автор ответа: dias101001

Ответ:

vп=v/2

Объяснение:

движение без проскальзывания ,значит скорость нижней точки 0,

wr=vп,где r радиус бревна , vп поступательная скорость бревна .Тогда в верхней точки общая скорость v будет равна сумме wr и vп.

v=wr+vп

v=2vп

vп=v/2

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