The 1000-lb elevator is hoisted by the pulley system and motor M. If the motor exerts a
Chapter 14, Problem 14-51(choose chapter or problem)
The 1000-lb elevator is hoisted by the pulley system and motor M. If the motor exerts a constant force of 500 lb on the cable, determine the power that must be supplied to the motor at the instant the load has been hoisted s = 15 ft starting from rest. The motor has an efficiency of \(\varepsilon = 0.65\).
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