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Q7.31     A cylinder of mass 10kg  and radius 15cm  is rolling perfectly on a plane of inclination 30^{0}. The coefficient
              of static friction \mu _{s}=0.25.

             (b) What is the work done against friction during rolling ?

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We know that the bottommost point of body (which is in contact with the surface) is at rest during rolling. Thus work done against the frictional force is zero.

Posted by

Devendra Khairwa

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