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Q.

If a cylinder is rolling down a rough inclined with initial sliding.

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a

after some time it may start pure rolling

b

after some time it must start pure rolling

c

it may be possible that it will never start pure rolling

d

cannot conclude anything

answer is A, C.

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Detailed Solution

 

Initially during slipping , frictional force opposes linear motion but helps its rotational motion .

If friction is enough to support pure rolling then it starts pure rolling when v=ωr is satisfied . Otherwise pure rolling never starts .

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