Assertion :When a disc is first allowed to spin about its axis and then placed lightly without any translational push on a perfectly frictionless table the centre of mass of the disc will advance. Reason: For rolling and sliding, frictional force is necessary to generate translational motion.

Statement I is True and Statement 2 is True and is a correct explanation of Statement 1.

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Statement I is True and Statement 2 is True but not a correct explanation of Statement 1.

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Statement I is True and Statement 2 is False

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Statement I is False and Statement 2 is True.

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Solution

The correct option is D Statement I is False and Statement 2 is True.
As it is a frictionless table, the velocity at the bottom point B and the top point A will both be same and equal to $v_{o} = R ω_{o}$ , the disc will rotate without any translational movement. Thus statement-1 is false. Frictional force is necessary for providing rolling motion.

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