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One end of a light spring of spring cons...

One end of a light spring of spring constant k is fixed to a wall and the other end is tied to a block placed on a smooth horizontal surface. In a displacment, the work done by the spring is `+(1/2)kx^(2)`. The possible cases are.

A

The spring was initially compessed by a distance x and was finally in its natural length .

B

It was initially stretched by a distance x and finally was in its natural length.

C

It was initially natural length and finally in a compressed position.

D

It was initially in its natural length and finally in a stretched position.

Text Solution

Verified by Experts

The correct Answer is:
A, B
Spring force is always towareds mean position If displacement is also towards mean position, F and S will be of same sign and work done will be posititve.
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Knowledge Check

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