Question

An 80kg man runs up the stairs in 20s. There are 25 steps; each one is 22cm high. What is the rate at which the man is doing work in horsepower (Hp)?​

Answer 1

Answer:

0.28hp

Explanation:

First well calculate height...

for h= 25×0.22(h in metre)

= 5.5m

For power/

p=work/time

=mgh/t

= 80×9.8×5.5/20

=215.6

in hp//

=215.6/746

=0.28 hp

hope this will help you