NEET Physics Question - Work Energy and Power - Potential Energy & Equilibrium

Assertion (A): When a non-conservative force is involved in a system, it may dissipate energy.

Reason (R): The work done by a non-conservative force is always negative.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

Assertion is true: Non-conservative forces like friction or air resistance dissipate mechanical energy into other forms (e.g., heat).

Reason is false: The work done by a non-conservative force is not always negative. For example, an applied external force can be non-conservative and do positive work on a system.

Thus, A is true but R is false.

Rankers Physics

Non-conservative Forces and Energy

Solution:

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