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A body of weight 30N hangs from one end ...

A body of weight 30N hangs from one end of a long, vertical spring whose other end is attached to a rigid support. The spring extends by 5cm when a force of 10N is applied to it. The time period of the vertical oscillations of the body is

A

`2sqrt((15pi))s`

B

`(pi//5)sqrt((3//2))sec`

C

`(pi//10)sqrt((3//2))sec`

D

`20)sqrt((2//3))sec`

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The correct Answer is:
B
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