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KE & PE Graph

Assertion :A ...

Question

Assertion :A spring has potential energy, both when it is compressed or stretched. Reason: In compressing or stretching, work is done on the spring against the restoring force.

A

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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B

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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C

Assertion is correct but Reason is incorrect

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D

Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
$P o t e n t i a l E n e r g y = 0.5 k x^{2}$
When string is stretched x is -ve and during compression x=+ve. In either cases, work will be done by spring to restore itself to the original shape. Hence, this Potential Energy is the work done against its restoring force.

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