Solved: The 50-lb block rests on the rough surface for
Chapter 14, Problem 14-58(choose chapter or problem)
The 50-lb block rests on the rough surface for which the coefficient of kinetic friction is \(\mu_{k} = 0.2\). A force \(F = (40 + s^{2}) \ lb\), where s is in ft, acts on the block in the direction shown. If the spring is originally unstretched (s = 0) and the block is at rest, determine the power developed by the force the instant the block has moved s = 1.5 ft.
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