alleryA man pushes a wall with a force of 200 N. The wall does not move. How much work has the man done?
A0 J
BNegative
CCannot be calculated
D200 J
Answer & Solution
Correct answer: A. 0 J
Work = Force × displacement.
Displacement here is 0 (the wall doesn't move).
**Hence work done = 200 N × 0 m = 0 J. Even though the man feels tired (his muscles spend energy), no MECHANICAL work has been transferred to the wall.**
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