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Question

A body of mass m, having momentum p is moving on a rough horizontal surface. If it is stopped in a distance x, the coefficient of friction between the body and the surface is given by:


  1. μ=p22 gm2x

  2. μ=p2gm2x

  3. μ=p2 gmx

  4. μ=p2 gm2x


Solution

The correct option is A

μ=p22 gm2x


|Wf|=12mv20=12mv2=p22m

μmgx=p22mμ=p22gm2x

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