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Laws of Motion — PHYSICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9PHYSICSLaws of Motion1 Mark
Question
A person pushing a wall hard is liable to fall back. Give reason.
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Answer

A person pushing a wall hard $($action$)$ by his palm, experiences a force $($reaction$)$ exerted by the wall on his palm in the opposite direction; thus, he is liable to fall backwards.

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