Task id8897

Task id8897

A thread is wound on a uniform shaft, capable of rotating around a horizontal axis, to the end of which a constant force F is applied (Fig.). When the point of application of this force traveled a distance of 20 cm, the shaft rotation speed reached 50 rpm. What will be the speed of the shaft when point A passes another 20 cm? (The rotation of the shaft began from a state of rest.)

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