Question

An elevator weighing 15,000 newtons is raised one story in 50 seconds. If the distance between stories is 3.0 meters, how much power is required of the motor? 750,000 W 45,000 W 5,000 W 900 W

Answer 1

Power
= Work done / Time
= 15000 N * 3 m / 50 s
= 45000/50 N-m/s
= 900 W

It may sound like an extremely low value, but 3.0 / 50 s is also a very slow speed.