Here's one obtuse thought for our resident physicists.
Does an object in motion come to rest, even for a nano second, if it's vector is altered to the exact opposite direction? Does it have to be an exact reversal of direction to postulate that it may have come to rest (zero velocity)?
|But then the path of the ball would have to have changed exactly 180 degrees - otherwise it would still be moving in the other dimension - assuming that a ball rolling on a green is moving in two dimensions. But if that is the case then, by definition, it would have had to have had a veolicty of 0 at some point so you could argue that it was at rest.
(Posted not by a physicist but an Electrical Engineer)