Задача id8855

The thin rod AB lies in bearings A and B (Fig. 44). The ball P, attached to the rod by a thread CP, oscillates in a plane perpendicular to the plane of the drawing. The mass of the ball is m, the distance AC = a, the distance CB = b, the length CP = l. At the moment when the ball passes through the lower position, its speed is v. What are the reactions of the bearings at this moment? (The mass of the rod and thread is assumed to be zero.)

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