5.68 •• CP In Fig. P5.68 Figure P5.68 m1 = 20.0 kg and 53.1°. The coefficient of a = kinetic friction between the block 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? m2
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