Question

A man pushing against a wall does not do any work. Explain briefly.

Answer 1

1. Work is said to be done when there is displacement.
2. Work done $\left(W\right)=$force $\left(F\right)\times$ displacement$\left(D\right)$
3. In the above-given statement, a main is pushing against a wall, which does not displace from its position even though the force is applied.
4. Therefore, Displacement is zero.

Thus, the work done is said to be zero.