Question

A man of mass 60 kg runs up a flight of 30 steps in 40 seconds. If each step is 20 cm high, calculate the power of the man.

Answer 1

$Given,m=60kg,t=40s,h=30\times 20=600cm=6m,g\cong 10m{s}^{-2}Now,P=\frac{W}{t}=\frac{mgh}{t}=\frac{60\times 10\times 6}{40}=90W$