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A cylinder rolls up an inclined plane, r...

A cylinder rolls up an inclined plane, reaches some height, and then rolls 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 descending

C

Down the incline while ascending and up the incline while descending

D

Down the incline while ascending as well as descending

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