Question

A coolie climbs the stairs while carrying a bag on his head is he doing any work or not

Answer 1

A coolie climbs the stairs while carrying a bag on his head he is doing work.Work is observed by point on which force is applied

Answer 2

Answer:

Yes the work is done by the coolie when is climbing up the stair case

Explanation:

For example when a coolie is carrying some load on his head and climbs up

the staircase he does some positive work  force and displacement are parallel to each other . so on the load as there is some upward displacement. In this case the force exerted by the coolie (mg) and the displacement both are in the upward direction