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A block of mass 1kg hangs without vibrat...

A block of mass `1kg` hangs without vibrating at the end of a spring whose force constant is `200(N)/(m)` and which is attached to the ceiling of an elevator. The elevator is rising with an upward acceleration of `(g)/(3)` when the acceleration suddenly ceases. The angular frequency of the block after the acceleration ceases is

A

`13(rad)/(s)`

B

`14(rad)/(s)`

C

`15(rad)/(s)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
The angular frequency is
`omega=sqrt((k)/(m))=sqrt((200)/(1))approx14(rad)/(s)`
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