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  4. A cylinder of mass 10 kg and radius 15 cm is rolling perfectly on a plane of inclination 30° and length 1 m . If the coefficient of static friction is μ =0.25 , then the work done against friction during rolling is

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Q. A cylinder of mass $10 \, kg$ and radius $15 \, cm$ is rolling perfectly on a plane of inclination $30^\circ $ and length $1 \, m$ . If the coefficient of static friction is $\mu =0.25$ , then the work done against friction during rolling is

NTA AbhyasNTA Abhyas 2020System of Particles and Rotational Motion

Solution:

The work done by friction force in case of pure rolling is always zero because the point of application of friction force doesn't slip