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Question

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


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Solution

  1. Work is said to be done when there is displacement.
  2. Work done (W)=force (F)× displacement(D)
  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.


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