(A) : In rolling, all points of a rigid body have the same linear speed.
(R) : The rotational motion do not change the linear velocity of an isolated rigid body.

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‘A’ is false and ‘R’ are true

Both ‘A’ and ‘R’ are true and ‘R’ is the correct explanation of ‘A’

Both ‘A’ and ‘R’ are true and ‘R’ is not the correct explanation of ‘A’

‘A’ is true and ‘R’ is false

answer is D.

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Detailed Solution

In case of a rolling body, rolling with some angular velocity, will have a linear velocity of velocity of centre of mass plus the angular velocity multiplied by the radius vector of the point. Therefore linear velocity of all the points won't be the same.

The body's linear velocity will not be changed due to rotation if it is isolated.

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