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Two dics of moments of inertia I1 and I2...

Two dics of moments of inertia `I_1` and `I_2` about their respective axes (normal to the disc and passing through the centre), and rotating with angular speed `omega_1` and `omega_2` are brought into contact face to face with their axes of rotation coincident. Find the angular speed of the two-disc system.

A

`(l_1omega_1-l_2omega_2)/(l_1-l_2)`

B

`(l_1 omega_1+l_2omega_2)/(l_1+l_2)`

C

`(l_1omega_2+l_2omega_1)/(l_1+l_2)`

D

`(l_1omega_2-l_2omega_1)/(l_1-l_2)`.

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JBD PUBLICATION-MOTION OF SYSTEM OF PARTICLES AND RIGID BODY-EXAMPLE
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