A man pushes a wall and fails to displac...

A man pushes a wall and fails to displace it.He does

negative work

positive but not maximum work

maximum positive work

no work at all

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The correct Answer is:

(d) As, work done (W) `=F.s =F s costheta` When a man pushes against a wall but fails to move it, then displacement of wall, s=0
`:. "Work done", W=Fxx0xx cos theta =0` Therefore, man does no work at all.

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