The cue ball rarely leaves the tip with overspin. That is difficult to accomplish and dangerous. If you meant something else, it was not clear from your statement. Please clarify.
A lot of people, including some top instructors believe this happens, in spite of the slow motion video evidence that disputes it. I have heard Jerry Briesath and Bert Kinister refer to "overspin" as the cue ball front spinning faster then the ball is rolling. MANY people believe the ball overspins its way down the table and never catches up. The slow motion video shows the ball just rolls faster and any small amount of cue tip induced overspin that might exist is converted to forward roll almost immediately but people don't believe that.
They overstate the effect of "high action" on the cue ball.
The slow motion videos show that is not what is actually happening and it isn't until the cue ball impacts something and lifts its weight off the table that it actually spins faster than its forward motion and that is because it is in the air with no friction. It might be able to over spin on ice or something but not much on a cloth table.
I would defer to you, as an authority on this and know you have tested it. Is my understanding accurate? BTW my intention is to improve my own understanding, not to debate the issue with anyone's personal belief. I would just like to get your opinion on my own understanding. One thing I am sure of, having a perfect technical understanding of the physics doesn't make a person a great pool player. I just "strive to be technically correct" in all areas of my life.
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