The 50-lb crate is hoisted by the motor M. If the crate starts from rest and by constant...

The 50-lb crate is hoisted by the motor M. If the crate starts from rest and by constant acceleration attains a speed of 12 ft/s after rising s = 10 ft, determine the power that must be supplied to the motor at the instant s = 10 ft. The motor has an efficiency ? = 0.65. Neglect the mass of the pulley and cable.