Assertion: The value of dynamic friction is less than the limiting friction.
Reason: Once the motion has started, the inertia of rest has overcome.

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Both Assertion and Reason are correct, and Reason is the correct explanation for Assertion.

Both Assertion and Reason are correct, but Reason is not the correct explanation for Assertion.

Assertion is correct, but Reason is incorrect

Assertion is incorrect, but Reason is correct

answer is A.

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Detailed Solution

The amount of friction that can be produced between two static surfaces in contact is referred to as the limiting friction. Once a force is placed between two surfaces that is bigger than their limiting friction, motion will happen where the force is based on the surface's characteristics. Limiting friction is a function of the normal response N between two surfaces that are in contact.

Limiting friction is the highest value of kinetic friction, i.e., a force is needed to move a body, and if friction is building up between two surfaces of contact, then a stronger force is needed. As a result, a strong force is needed to break the interlocking between the surfaces, and once the body starts moving, a smaller force is needed to move the body due to friction. As a result, we can conclude that dynamic friction is less than limiting friction because moving a body against limiting friction requires more force.

Option A is the correct answer.

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