So you can't see any
significant swerve on the short shot we are discussing and yet you believe it is there because...well, you haven't offered any evidence for why you believe it is there in an amount that makes a significant practical difference for this particular shot.
Exactly, and in that short of a distance, at that speed of hit you need to make the ball, there isn't time/distance enough for there to be any significant swerve. If you were 4 feet away from the shot then yeah you might have some significant swerve.
The other thing you have to keep in mind about swerve is that it is also
relative to the speed of the cue ball given the same rate of spin (although the rate of spin ratio can change over time/distance as well). With a fast moving cue ball swerve is just not able to happen much, but as the cue ball slows the swerve is able to happen more but it isn't happening much in the first foot of travel on more briskly hit shots such as this one when hit in the typical (not highly elevated which wouldn't at all be typical here) manner.
I am almost certain a good portion if not all of what you thought was swerve over that 5' of travel after rebounding from the rail was not swerve and in fact the cue ball was tracking on a fairly straight line. I talk about one of the things that could change the rebound angle (that someone could easily misinterpret as being "swerve" when it is not) in the last paragraph of post #36 which I will link to at the very bottom of this post.
First off, you aren't getting any 1" of swerve on this shot if you are shooting it in any typical way that would happen in important games. Closer to .1" than 1" and fairly inconsequential to this particular shot in any case. Which brings up a point. The percentage doesn't matter for the purposes of whether it is significant or not on this shot (significant meaning that it is an objectively large amount that must be adjusted for or you are guaranteed to miss the shot). It doesn't matter if it is even 50% if that 50% only equates to one millionth of an inch over that shot distance at that shot speed as that is still totally insignificant and is making no material difference to the shot.
I believe that to be the case here. With 10" of shot distance, at the speed with which you must hit it to pocket the ball (which isn't super slow), if you are hitting it in any realistic way that would typically be played in a game that matters there just isn't enough time/distance for swerve to start happening in any amount that is significant to this particular shot, as in making any big practical difference that would otherwise guarantee a miss if not adjusted for (regardless of what the "percentage" is, although I happen to believe the percentage is also pretty small on this shot too because the swerve hasn't been able to start working much yet).
caught this in a book recently..curious if there's any debate
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