Multiple choice

A person pushing against a wall ______.

  1. does work

  2. does no work unless the wall is moved

  3. produces displacement

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Work is defined as force multiplied by displacement in the direction of the force (W = F × d × cosθ). When pushing against a wall that doesn't move, the displacement is zero, so no work is done regardless of how hard you push. Option A is incorrect because no displacement means no work. Option C is wrong because the wall doesn't move. Option D is incorrect since B is the right answer.

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