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A student says that he had applied a for...

A student says that he had applied a force `F=-ksqrtx` on a particle and the particle moved in simple harmonic motion. He refuses to tell whether k is a constant or not. Assume that he has worked only with positive x and no other force acted on the particle

A

as x increase k increase

B

as x increase k decrease

C

as x increase and k remains constant

D

the motion cannot be simple harmonic

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The correct Answer is:
A
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