Hi all, I have a question. First, a moving ball, ball A, slides straight into a ball which is standing still, ball B. The balls then collide, and ball B rebounds along, say, the Y-axis at a certain speed. Now suppose we recreate the collision, except this time, ball B is spinning on its Z-axis. Afterwards, the Y-component of ball B's rebound velocity will be the same as the previous time, correct? This is an example of linear momentum always being conserved in a collision? To make things simpler, the ground is frictionless, and the collision is non-elastic with no deformation when the balls collide.