Quantity of Ball 2
Just as we would say about a glass that it is filled up to the brim, ¾ full or half full etc..., and fill it as we want, we can, with the cue ball hit the second ball full, ¾ full, ¼ full etc... We will call these differences, QUANTITIES, here are the main variations.
These quantities give the directions of balls 1 and 2 and define their speeds.
