Assertion : Speed of any point on rigid body executing rolling motion can be calculated by expression `v =r omega`, where r is distance of point from intantaneous centre of rotation
Reason : Rolling motion of rigid body can be considered as a pure rotation about instantaneous centre of rotation.

Options

A. If both Assertion and Reason are correct and Reason is the correct explanation of Assertion
B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C. If Assertion is true but Reason is fasle
D. If Assertion is false but Reason is true

Answer

C

Explanation

In a rotating body, every particle has different linear velocity to be calculated by formula `v = omegar`. All rolling motion can not be considered pure rotation. For pure rotation, the condition is linear velocities of body `= omega r`