Two electric motors drive two elevators of equal mass in a three-story building 10 meters tall. Each elevator has a mass of 1,000 kg.

The first elevator can do this work in 5.0 seconds.

Calculate the power output of the first motor.

Question

Two electric motors drive two elevators of equal mass in a three-story building 10 meters tall. Each elevator has a mass of 1,000 kg.

The first elevator can do this work in 5.0 seconds.

Calculate the power output of the first motor.

anonymous · Answer

P ouput = W/t = m g h /t
where m is mass of two electric motor, g is accelertion of gravity (10 m/s^2), h is building tall, and t is time.

So 

P output = (1000 kg x 10 x 10)/5
Poutput = 20 000 Watt