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A 20 kg body is released from rest so as...

A 20 kg body is released from rest so as to slide in between vertical rails and compresses a vertical spring `(k=1920(N)/(m)`) placed at a distance `h=1.0`m from the strating position of the body. The rails offer a frictional force of 40 N opposing the motion of body. Find (a) the velocity v of the body just before striking with the spring, (b) the maximum compression of the spring and (c ) the distance `h^(')` through which the body is rebounded up.

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