MCQ
A smooth sphere $A$ is moving on a frictionless horizontal plane with angular speed $\omega $ 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 ${\omega _A}$ and ${\omega _B}$ respectively. Then
- A${\omega _A} < {\omega _B}$
- B${\omega _A} = {\omega _B}$
- ✓${\omega _A} = \omega $
- D$\omega = {\omega _B}$
