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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 thoughout these motions) .The directions of the firctional 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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The correct Answer is:
b
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