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Q.

A solid cylinder is rolling down the inclined plane without slipping. Which of the following is/are correct

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a

The friction force is dissipative

b

The friction force is necessarily changing

c

The friction force will aid rotation but opposes translation

d

The friction force is reduced if θ is reduced

answer is C, D.

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Detailed Solution

For pure rolling frictional force is given by , f = mg sin θ1+mR2Ic.

Direction of frictional force on the cylinder is up the inclined plane .

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