Select the option that is true regarding the following two statements labelled Assertion (A) and Reason (R).

(A): An object slips less on a rough surface than a smooth surface.

(R): When a surface is rough, frictional force increases.

Question

Question

This question was previously asked in

SSC CGL 2023 Tier-I Official Paper (Held On: 20 Jul 2023 Shift 1)

Assertion (A) is true and Reason (R) is false.
Both Assertion (A) and Reason (R) are the true but Reason (R) is not a correct explanation of Assertion (A).
Assertion (A) is false and Reason (R) is true.
Both Assertion (A) and Reason (R) are the true and Reason (R) is a correct explanation of Assertion (A).

Answer 1

The correct answer is Both Assertion (A) and Reason (R) are the true and Reason (R) is a correct explanation of Assertion (A).Key Points

Assertion (A) is true because a rough surface provides more contact points between the object and the surface, increasing the frictional force and reducing slipping.
Reason (R) is also true because frictional force increases with roughness as the irregularities in the surface create more resistance.
Both Assertion (A) and Reason (R) are related and true, and Reason (R) provides a correct explanation for Assertion (A).

Additional Information

Frictional force:-
- It is a force that opposes motion between two surfaces in contact.
- It is dependent on the nature of the surfaces in contact, the normal force, and the coefficient of friction.