Q148 / 180 · AIIMS 2005 · Physics

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
Correct answer
D
If both assertion and reason are false.

Solution

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.

Hence, the correct answer is option: 'D'.

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