Question

Read the given statement carefully and answer whether work is done or not done, and why?

A porter carrying a heavy load, going down the stairs.

Answer 1

Work is done whenever the given conditions are satisfied:

1. A force acts on the body.
2. There is a displacement of the body by the application of force in or opposite to the direction of the force.
3. Both the angle between force and displacement is not ${90}^0$.

Hence, porter does work as a component of force in direction of displacement.