A 60-kg women runs up a staircase 15m high (vertically) in 20s.?

Question

(a)How much power does she expend? (b)What is her horsepower?

Answer 1

We know that,
power=work/time
i.e., power=(m*g*h)/t
i.e.,power=(60*9.8*15)/20
i.e.,power=441watts

Now,746 watts=1 hprse-power(HP)
So,441 watts=(1/746)*441 HP=0.59 HP