I think the jump speed likely overrides the bounce factor that contributes to skids. Skids on pool tables only happen at velocities less than jump speed, right?
If people want to see an exaggerated example of this, see the following video:
Agreed. Cling (AKA "kick") can certainly cause ball hop (as illustrated in HSV B.46 - CB and OB hop and spin transfer during follow shots), but cling is certainly not the only cause for ball hop (as described and demonstrated on the ball hop resource page).
Agree. Cling can also have a big effect on straight (or nearly straight) follow shots due to the loss of CB spin during the collision, which can drastically reduce the amount of follow, as demonstrated in the following video:
Bob, I don't see inside follow, or outside follow for that matter, potentially bringing the fresh chalk mark into the CB-OB contact area unless we're talking about nearly straight shots. If you cue along the 1:30 radius, for example, the spin equator is initially aligned along the 1:30-7:30 diameter as seen from the shooter's perspective. It will then tend to "rotate" counter-clockwise (reorient itself) and become more vertical as the CB picks up more topspin. If you cue along the 10:30 radius, the spin equator is initially aligned with the 10:30-4:30 diameter and will then precede to "rotate" clockwise to become more vertical. In either case, it never comes close to a horizontal orientation. No???
Draw with english does present a risk because of the same counter-clockwise or clockwise reorientation. But with draw, the spin equator passes through the horizontal plane if the CB doesn't reach the OB first.
LOL. Sorry, but "bad contacts" are the result of excess friction, just as we cheeky Colonists have been saying.
I think it should be said that this doesn't mean the chalk mark from the immediate hit is likely to be the culprit or that these kinds of spin increase the chances of skid appreciably. If skid happens on one of these kinds of shots it's way more likely that a chalk mark left by a previous hit (or some other spot of something) is to blame.
Hmm. Maybe. I can sort of see how without friction from the cloth and a level stick the spot crosses the ball's equator (where all ball-ball contact occurs for non-bouncing balls) directly in front of the shooter. I don't see yet how that equator crossing location will change as the cue ball starts rolling smoothly and/or starts losing its side spin. I think Virtual Pool probably has the necessary simulation machinery to answer the question.
I agree. With some cue balls, conditions, and chalk, the CB gets covered with chalk marks/smudges during a game. Even for a straight follow shot, where the chances are greatest for a new chalk mark to end up a the ball contact point, the odds of hitting the new mark are very low over a range of CB distances. Assuming about a 1/4" chalk mark size, the chances are only 3-4% (0.25 / (2.25*pi)), assuming the CB is struck very close to the CB vertical centerline (so there is no sidespin component).
Unless you've got something better than that infotainment fluff piece by the BBC (Thaig's "indepth study"), I think I'll just rethink whether your posts are worth looking at.
