NEETPhysicsWork, Power and Energy
Assertion: Spring force is a conservative force. Reason : Potential energy is defined only for conservative forces.
Options
- AIf both Assertion and Reason are correct and Reason is the correct explanation of Assertion
- BIf both Assertion and Reason are true but Reason is not the correct explanation of Assertion
- CIf Assertion is true but Reason is false
- DIf Assertion is false but Reason is true
Correct answer
A. If both Assertion and Reason are correct and Reason is the correct explanation of Assertion
Step-by-step solution
Spring force follows Hooke's law (F=-k x ). Work done by spring depends only on initial and final positions, not the path ( ) so it is conservative. For conservative forces, we can define a potential energy function ( (U= 1 2 k x^2 )). Hence, spring force is conservative because potential energy is defined only for conservative forces.