- #1
konichiwa2x
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A cylinder rolls up an inclined plane, reaches some height and rolls down (withot slipping throughout these motions). The directions of frictional force acting on the cylinder are : (more than one option may be correct)
(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 as well as descending.
(d) Down the incline while ascending as well as descending.
I feel the frictional force should be down the incline while moving up and up the incline while moving down since friction opposes relative motion between the surfaces in contact. But my book says the answer is (B). Is it wrong?
(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 as well as descending.
(d) Down the incline while ascending as well as descending.
I feel the frictional force should be down the incline while moving up and up the incline while moving down since friction opposes relative motion between the surfaces in contact. But my book says the answer is (B). Is it wrong?