A smooth sphere A is moving on a frictio...

A smooth sphere A is moving on a frictionless horizontal plane with angular speed `omega` and centre of mass velocity `upsilon`. It collides elastically and head on with an identical sphere B at rest. Neglect friction everywhere. After the collision, their angular speeds are `omega_A and omega_B` respectively. Then

`omega_Altomega_B`

`omega_A=omega_B`

`omega_A=omega`

`omega_B=omega`

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