Question

suppose a boy is climbing a staircase in this case whether work is done or not state the reason for the same​

Answer 1

Answer:

yes there is work is said to be done. When the person is climbing up the stairs, he is applying force in downward direction and the normal reaction force is in the upward direction. ... Hence the normal reaction and displacement is in the same direction, that means work done by the force is positive.

Hope it's helpful

Answer 2

Answer:

When the person is climbing up the stairs, he is applying force in downward direction and the normal reaction force is in the upward direction. ... Hence the normal reaction and displacement is in the same direction, that means work done by the force is positive.

Explanation:

hm yaar aapki help krte hai