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A ballot dancer is rotating about hyis o...

A ballot dancer is rotating about hyis own vertical axis on smooth horizontal floor with a time period `0.5 sec`. The dancer flods himself close to his axis of rotation due to which his radius of gyration decreases by `20%`, then his new time period is

A

`0.1 sec`

B

`0.25 sec`

C

`0.32 sec`

D

`0.4 sec`

Text Solution

Verified by Experts

The correct Answer is:
C
`I_(1)omega_(1)=I_(2)omega_(2),MK_(1)^(2)(2pi)/(T_(1))=MK_(2)^(2)(2pi)/(T_(2))`
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