Question

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

ΔU= -W

Here, ΔU is change in potential energy and W is work done by conservative force

Answer 1

Answer: This is True

Explanation:

Work done by a conservative force is negative then according to the relation W= -ΔU

here ΔU represents change in potential energy

So if work done is negative then the change in potential energy is positive (because we have a negative sign in the relation i.e. -(-W) =+W ) which means Potential energy associated with that force will increase.

Answer 2

Both assertion and reason are true and the reason is the correct explanation of the assertion.

• If work done by a conservative force is negative, then the potential energy associated with that force should increase.
• The conservative force produces negative work on the body when it displaces the body in the opposite direction of the force. As a result, the body shifts away from the centre of force. As a result, the distance between the body and the centre of force widens. As a result, the body's potential energy will be increased.
• This is according to the relation, ΔU= -W.
• Hence, both assertion and reason are true and the reason is the correct explanation of the assertion.