Question

(13%) Problem 8:   An elevator motor lifts a 2300-kg load a height of 38 m in 13.5 s.

Part (a) Find the useful power output of the elevator motor, if it also increases the speed from rest to 3.9 m/s. Assume that the total mass of the counterbalanced system is 10,000 kg — so that only 2300 kg is raised in height, but the full 10,000 kg is accelerated.

Part (b) How much does it cost, in dollars per hour, if the electricity cost is $0.085 per kW⋅h?

Answer 1

change unit carefully. Hope you got. Rate my answer please