Question

. A person weighing 750 N gets on an elevator.
The elevator lifts the person 10 m in 25 s. How
much power was used?

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Answer 1

 

F = 750 N  (Force)

d = 10 m  (displacement )

t = 25 s   (time)

L = ?   (Mechanical work )  =  (Energy)

P = ?   (Power)

Solve:

L = F × d = 750 × 10 = 7500 Joules

P = L / t = 7500 / 25 = 300 Watts