NEET Physics Question - Rotational Motion - Rolling on Inclined Plane

Assertion (A): A wheel slides downward on frictionless inclined plane, without rolling.

Reason (R): In pure rolling work done against friction always zero.

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:

On a frictionless inclined plane, there's no torque to cause rotation, so a wheel will only slide; thus (A) is true.

In pure rolling, the point of contact is instantaneously at rest, so static friction does no work *by* it. The statement 'work done against friction always zero' is not universally true, making (R) false.

Rankers Physics

Work Done by Friction on Rolling Plane

Solution:

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