NEET Physics Question - Solid and Fluids

Assertion (A): Identical springs of steel and copper are equally stretched. More work will be done on the steel spring.

Reason (R): Steel is more elastic than copper.

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 (A) is true. Work done to stretch a spring is \(W = \frac{1}{2} k x^2\). Steel has a higher Young's modulus than copper, implying a higher spring constant \(k\) for identical dimensions.

Thus, more work is done on the steel spring.

Reason (R) is true. Steel is indeed more elastic than copper (possesses a higher Young's modulus).

Reason (R) correctly explains Assertion (A).

Rankers Physics

Elasticity and Work Done in Springs

Solution:

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