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KE & PE Graph

Assertion :Gr...

Question

Assertion :Graph between potential energy of a spring versus the extension or compression of the spring is a straight line Reason: Potential energy of a stretched or compressed spring is proportional to square of extension or compression

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 D Assertion is incorrect but Reason is correct
When we stretch a wire, some work is done against the internal restoring forces acting between particles of the wire that work done appears as elastic potential energy in a wire.
Elastic potential energy $(u) =$ $\frac{1}{2} (Y o u n g^{'} s m o d u l u s) \times (s t r a i n)^{2}$
Potential energy of a stretched or compressed spring proportional to square of extension or compression.
Option D is the correct answer.
Assertion is incorrect but Reason is correct

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