Assertion :Frictional force is independent of the velocity of the body. Reason: Friction is due to surface irregularities.

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

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

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Friction force depends on the nature of the materials in contact and their coatings for both static and kinetic (moving) conditions and is independent of velocity of body.

Friction always opposes the relative motion between the two contact surfaces in contact. In result it can either increase or decrease the velocity of the bodies.

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