Question

A 70kg man runs up a long flight stairs in 4 sec. The vertical height of stairs is 4.5 m. Calculate the power output of man.​

Answer 1

Answer:

787.5 J/s

Explanation:

Power = work/time

and

work = force × displacement

thus,

power = f × s /t

viz

m×a×s/t

then

on substituting the values

we get

70*9.8*4.5/4

which on solving will be

771.75 J/s