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A block of mass M is placed on a horizon...

A block of mass M is placed on a horizontal surface having coefficient of friction m. A constant pulling force `F=(Mg)/2` is applied on the block to displace it horizontally through a distance d. Find the maximum possible kinetic energy acquired by the block.

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The correct Answer is:
`Mgd[(sqrt(u^(2)+1)/2-mu]`
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