JEE Main Physics question

A cylinder rolls up an inclined plane, reaches some height, and then rolls back down (without slipping throughout these motions). The directions of the frictional force acting on the cylinder are

(A)Up the incline while ascending and down the incline while descending
(B)Up the incline while ascending as well as descendingCorrect
(C)Down the incline while ascending and up the incline while descending
(D)Down the incline while ascending as well as descending

Answer: (B)

Solution

The component of weight (mg sinθ) along the incline always acts downward, whether the cylinder is ascending or descending. For rolling without slipping, the

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Question ID VK-153099