A pulley of mass M has radius a and the axle has a diameter D. If the

Question:

A pulley of mass M has radius a and the axle has a diameter D. If the coefficient of kinetic friction between the axle and the pulley is μk determine the vertical force P on the rope required to lift the block of mass MB at constant velocity.


Given:

a = 120 mm

M = 5 kg

D = 40 mm

μk = 0.15

MB = 80 kg



M(g) MB P.


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