The crate, having a weight of 50 lb, is hoisted by the pulley system and motor M.

Question:

The crate, having a weight of 50 lb, is hoisted by the pulley system and motor M. if the crate starts from rest and, by constant acceleration, attains a speed of 12 ft/s after rising 10 ft, determine the power that must be supplied to the motor at the instant s = 10 ft. The motor has an efficiency E = 0.74.