In the choices the word rolling should be replaced by spinning.
It is not clear whether the floor is rough or smooth.
Considering smooth and since there is no friction between the spheres and the collision being elastic and the masses being equal they will interchange their linear velocity and the first body keeps spinning with the same angular velocity.
Therefore the answers A and C are correct.
Moderation Team
![[Post New]](/templates/default/images/icon_minipost_new.gif){kind=icon}
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
109
1
