The 50-lb load is hoisted by the pulley system and motor M. If the motor exerts a constant...

The 50-lb load is hoisted by the pulley system and motor M. If the motor exerts a constant force of 30 lb on the cable, determine the power that must be supplied to the motor if the load has been hoisted s = 10 ft starting from rest. The motor has an efficiency of ε = 0.76.