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Two identical discs are positioned on a vertical axis as shown in the figure. The bottom disc is rotating at angular velocity `omega_(0)` and has rotational kinetic energy `K_(0)`. Change in the rotational kinetic energy of the system is

A

`k_(@)//6`

B

`-(1//2)k_(@)`

C

`-(1//4)k_(@)`

D

`k_(@)//8`

Text Solution

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The correct Answer is:
B
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