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Work And Energy — Science STD 9 — Question

Rajasthan BoardEnglish MediumSTD 9ScienceWork And Energy1 Mark
Question
A boy is pushing hard on a wall. Is he doing work?
✓

Answer

  1. No
Explanation:
Work = Force × Displacement
Here, the wall is not moving although the boy is pushing hard.
$\therefore$ Displacement = 0
$\therefore$ Work = 0

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