A smooth sphere A is moving on a frictionless horizontal plane with angular spee

Question

A smooth sphere A is moving on a frictionless horizontal plane with angular speed

ω

and centre of mass is moving translationally with velocity 'v'. It collides elastically and head-on with an identical sphere B which is at rest. All surfaces are frictionless. After the collision, their angular speeds are

ω_{A}

and

ω_{B}

, respectively. Then,

Options:

A . ωB=0

B . ωA=ωB

C . ωA

D . ωB=ω

Answer: Option A
:
A

ω_{B} = 0

rotational KE can’t be transferred from A to B as surfaces are frictionless.

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