Q.

A body starts sliding on a rough horizontal surface with a speed of 10 m/s. If the coefficient of friction is 0.2, find the distance travelled (in meters) by the body before coming to rest. (g = 10 m/s2)

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answer is 25.

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Detailed Solution

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Using the work-energy theorem, we get

μmgs=12mv2  or  s=v22μg=10×102×0.2×10=25 m

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