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Two discs of moment of inertia I1, and I...

Two discs of moment of inertia `I_1, and I_2` and angular speeds`omega_1 and omega_2` are rotating along collinear axes passing through their centre of mass and perpendicular to their plane. If the two are made to rotate together along the same axis the rotational KE of system will be?

A

`(I_(1)omega_(1)+I_(2)omega_(2))/(I_(1)+I_(2))`

B

`(I_(1)omega_(1)-I_(2)omega_(2))/(I_(1)+I_(2))`

C

`(I_(1)omega_(1)+I_(2)omega_(2))/(omega_(1)+omega_(2))`

D

`(I_(1)omega_(1)-I_(2)omega_(2))/(omega_(1)-omega_(2))`

Text Solution

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The correct Answer is:
B
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