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)?
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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
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