Question

A person is holding a heavy bag on his head for 20 minutes and gets tired. Has he done some work or not? Explain.

Answer 1

A person is holding a heavy bag on his head for 20 minutes and gets tired..It is said that no work is done..
This is because his weight on the ground or the force of gravity acts in vertically downward direction while its displacement is in horizontal direction..
So, the angle between the force and displacement is 90 degree..
Therefore, work done is 0..

Answer 2

Answer:

hope it helps.....

Explanation:

plzz mrk it as the brainliest