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Assertion: Frictional forces are conserv...

Assertion: Frictional forces are conservative forces.
Reason: Potential energy can be associated with frictional forces.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

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

C

If assertion is true but reason is false

D

If both assertion and reason are false

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The correct Answer is:
D
Frictional work is not completely recoverable. When the force of friction is the total mechanical energy is not conserved. The friction force is therefore called a nonconservative or a dissipative force.
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Assertion: Frictional force are conservative forces. Reason: Potential energy change can be assorciated with frictional forces.

These questions consists of two statements each printed as Assertion and Reason. While answering these question you are required to choose any one of the following five reponses (a) If both Assertion and Reason arecorrect and Reason is the correct explanation of Asserrtion. (b) If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion. (c ) If Assertion is true but Reason is false. (d) If Assertion is false but Reason is true. Assertion Spring force is a conservative force. Reason Potential energy is defined only for conservative forces.

Assertion: Work done by friction over a closed path is not zero and no potential energy can be associated with friction. Reason: Every force encountered in mechanics have an associated potential energy.

Friction is non-conservative force. How ?

Work done by frictional force

Direction Of Frictional Force

Is friction a non-conservative force?

Conservative Force||Potential Energy Relations

These questions consists of two statements each printed as Assertion and Reason. While answering these question you are required to choose any one of the following five reponses (a) If both Assertion and Reason arecorrect and Reason is the correct explanation of Asserrtion. (b) If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion. (c ) If Assertion is true but Reason is false. (d) If Assertion is false but Reason is true. Assertion If work done by conservative force is negative, then potential energy associated with that force should increase. Reason This is according to the relation DeltaU=-W Here, DeltaU is change in potential energy and W is work done by conservative force.

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