An electric motor develops 65 kw of power as it lifts a loaded elevator 17.5 m in 35.0 s. How much force does the motor exert ?

Question

An electric motor develops 65 kw of power as it lifts a loaded elevator 17.5 m in 35.0 s. How much force does the motor exert ?

Answer 1

Force x Distance = Work

Work/Time = Power

Work = Power x Time

Substituting:

Force x Distance = Power x Time

Force = (Power x Time)/Distance

1. Power = 65 kw = 65,000 watts
2. Distance = 17.5 m
3. Time = 35 s

Plug in the numbers and compute the answer.