Question

A 70kg boy runs up a flight of staircase 3 m high in 3.5 s. How much power does he use to climb up the steps

Answer 1

588 Watts

Step-by-step explanation:

Power = work / time

Work = force × distance

Work done by the boy:

W = mg × h

W = (70 kg) (9.8 m/s²) (3 m)

W = 2058 Joules

Power:

P = W / t

P = (2058 J) / (3.5 s)

P = 588 Watts