Задача id8870

A block of mass M stands on a smooth horizontal plane (Fig. 54). A thread of length l is attached to a block, at the end of which there is a ball of mass m. At the initial moment, the thread was deflected at a certain angle and released without an initial speed. Find the speed of the block at the moment when the thread passes through the vertical position, knowing that its angular velocity at this moment is equal to ω.

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