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