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CP In Fig. P5.74, m1 = 20.0 kg and = 53.1o. The

Chapter 8, Problem 68P

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QUESTION:

CP? In ?Fig. P5.74?, m1 = 20.0 kg and ? = 53.1o. 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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QUESTION:

CP? In ?Fig. P5.74?, m1 = 20.0 kg and ? = 53.1o. 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?

ANSWER:

Solution 68P Step 1 of 6: The free body diagram for mass M 1 Here the x-axis is taken along the surface of the wedge, Four forces acts on the block of mass 1 , Tension =T along x-axis Weight W= M g1 Normal force will be equal to the component of weight, N= W cos Using W= M g 1 N= M g cos 1 Friction force, f = N k k Using N= M g cos, 1 fk= Mkg co1

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