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

and ω(B) respectively. Then?a) ωA is lesser than ωB

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

1.	A smooth sphere A is moving on a frictionless horizontal plane with angular speed ω and the centre of mass velocity u. It collides elastically and head on with an identical sphere B at rest. Neglect friction everywhere. After the collision, their angular speeds are ω(A) and ω(B) respectively. Then?
A.	and ω(B) respectively. Then?a) ωA is lesser than ωB
B.	ωA=ωB
C.	ωA=ω
D.	ωB=ω
Answer» D. ωB=ω

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