You are given a cylinder once …
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Naveen Sharma 8 years, 9 months ago
Ans. The direction of the frictional force will be up the inclined plane in both the motions.
The friction acts opposite to the relative motion of the point of contact on ground. In both the cases the force acting on the point of cylinder in contact with the plane is {tex}mgSin\theta{/tex}.
As there is pure rolling the velocity and acceleration of the point of contact must be zero. So friction acts upwards along the inclined plane.
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