85.
A smooth sphere A is moving on a frictionless horizontal plane with angular speed ω and center of mass with velocity v . It collides elastically and head-on with an identical sphere B at rest. Neglect friction everywhere. After the collision, their angular speeds are ωA and ωB respectively. Then
(a) ωA<ωB
(b) ωA=ωB
(c) ωA =ω
(d) ω =ωB
Ans. c
(3)