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How to Increase Friction

Assertion :In...

Question

Assertion :In order to reduce sliding friction, lubricants are used. Reason: Lubrication changes the conditions of rubbing, replacing the sliding friction by rolling friction, there by reducing the force of friction.

A

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

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B

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

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C

Assertion is correct but Reason is incorrect

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D

Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Lubricants like oil help in reducing friction because the molecules of a lubricant slide past each other more easily as compared to others materials.
Also, the lubricants fill the pits of rough surfaces thus changing the sliding friction by rolling friction.
Therefore, both assertion and reason are correct and the reason is the correct explanation of the assertion.

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