**Theory: **When the man goes up stairs, he is doing work by lifting his own weight to a vertical height. This work is equal to the gain in the potential energy of his body. Power is the rate of doing work (P = W/t). Hence, the gain in potential energy will be calculated which is equal to the work done and then divided by the time he takes will give us the power of the man.

Pingback:Work and Energy, Numerical Problems … msa – msa