The 4 lb pulley has a diameter of 1 ft and the axle has a


The 4 lb pulley has a diameter of 1 ft and the axle has a diameter of 1 in. if the coefficient of kinetic friction between the axle and the pulley is 0.20, determine the vertical force P on the rope required to lift the 20 lb block at constant velocity.

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Mechanical Engineering: The 4 lb pulley has a diameter of 1 ft and the axle has a
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