To reduce the power requirement of elevator motors, elevators arecounterbalanced with weights connected to the elevator by a cablethat runs over a pulley at the top of the elevator shaft. Neglectany effects of friction in the pulley. Assume a 1000 kg elevator that carries a maximum load of 800 kgis counterbalanced with a mass of 1400 kg.
a) What is the power provided by the motor when the elevator ascends fully loaded at a speed of 2.6 m/s.
b) How much power is provided by the motor when the elevator ascends at 2.6 m/s without a load?