NEET Physics Question - Rotational Motion

Assertion (A): A body is rolling without slipping on a surface. There must be frictional force to start such a motion.

Reason (R): In rolling without slipping, work done against the frictional force is zero on rolling body.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

Assertion (A) is true: Friction provides the necessary torque to initiate the angular acceleration required for rolling.

Reason (R) is true: In pure rolling, the point of contact is instantaneously at rest, so the work done by static friction is zero. Both statements are true, but R does not explain A.

Rankers Physics

Friction and Work Done in Rolling

Solution:

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