Question

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

Answer 1

Answer: (D)

Forces that cannot be attributed to the energy content of any body are called as non conservative forces. Friction cannot be attributed to the energy content in any body. Thus A is wrong. Also the potential energy is the energy by virtue of its position under gravity or any force field. It is a conservative force and cannot be associated with frictional forces. Thus the second statement is also wrong.