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CP In Fig. P5.74, m1 = 20.0 kg and α = 53.1°. The coefficient of kinetic friction between the block of mass m1 and the incline is μk= 0.40. What must be the mass m2 of the hanging block if it is to descend 12.0 m in the first 3.00 s after the system is released from rest?
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