Willis Tower is a 442 meter tall, 108 story skyscraper.

Question

The elevator can reach the skydeck on the 103rd floor in about 60 seconds. Determine the power used by the motor to lift 11 physics students. The mass of the passengers & elevator is 1300 kg.

Answer 1

Power is defined as the rate of work or energy production. In this case you are producing potential energy from work:

P = mgh/t