Assertion : Friction is a self-adjusting force.Reason : Friction does not depend upon mass of the body

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If both assertion and reason are true and reason is a true explanation of assertion.

If both assertion and reason are true but reason is not the correct explanation of assertion.

If assertion is true but reason is false.

If both assertion and reason are false.

answer is A.

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Detailed Solution

Only static friction is a self-adjusting force. This is because force of static friction is equal and opposite to the force applied parallel to the plane of tangency between two objects in contact ( so long as actual motion does not start). .Also maximum frictional force fmax = μN ; This N may not be equal to mg.

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