Hello English,
I've never heard this before. What do you mean about the defection direction? Anymore information on this?
Thanks
Hi, Johnboy,
I have a brother-in-law that we often call John Boy. He's the youngest fo 10.
The actual direction of the squirt is directly through the center of the mass which is (or should be) the actual center of the the middle core point of the ball.
So... if the tip hits at 3:00 on the equator as you look 'through' the cue ball & at 7:30 when viewed from the top, then the squirt vector will be at 1:30 on the clock viewed from overhead. If you move to 8:00 it will be at 2:00.
That is just the squirt vector & it is combined with the forward momentum force vector for a net effect somewhere in between.
Now say you go low or high with the tip from off of the equator but stay at the 7:30 spot on the clock viewed from above. Now the squirt vector will be on a line of 1:30 on the clock viewed from above but it will also be aimed up if the tip went low or down into the table if the tip went high.
Both of those would be inhibited by gravity in the up direction & by the table in the down direction.
That is why it seems that hitting a ball combo high & side seems to have less squirt because the squirt is in the down/side direction is resisted by the table. So the ball gets on a more 'straight' line to less 'net' squirt because the table resists the downward component but even that is not resisted directly because the contact with table is off to the side of that line.
That is why I say that in the very short time of contact there is a rather 'huge' amount of stuff going on.
I don't know where you can get more on this as I understand it from my physics education.
I would guess that there might be something on Dr. Dave's site but I would not think there is much detail other than to say what I have said that the squirt is through the actual center point of the ball.
I hope I've painted a picture that allows you to see it. I wish I had a chalk board to do some drawings.
I NEVER think of ANY of the physics that I know when I'm Playing the Game.
It's just enough to know that you will get less side ways squirt if you go above or below the equator & it is not just because of swerve.
Actually if you hit on the equator with a level cue & the ball is spinning on it's vertical axis you would get no swerve. Picture a ball spinning in place. It does not move even when it slows to stop.
But since we can rarely hit with a perfectly level cue it would take a very slight above the equator hit to torque the ball into that perfect vertical axis spin. Hence that results in the most net squirt & the more you go toward the edge of the ball & away from center the more it would be.
Best Wishes to You & Yours,
Rick
PS I trust my subconscious mind to 'know' all that is necessary much much more than I would ever trust my conscious mind to fully understand & then calculate & then plan for ALL that is going on during that very short contact time & especially for an off center hit when using english. That is why I am very glad that I stared playing & using english at 13 yrs. old which was 2+ yrs. before my first physics class. I learned to Play way before I consciously knew what wa going on & I would much much rather have it that way. Ignorance can be bliss even you if know what you know. Please note that word ignorance is a derivation of the word ignore. Sometimes it is better to ignore what you know... & just PLAY.
There is no such thing as a simultaneous hit. Either you hit rail first, or ball first. Ball first is far more difficult, and requires a much higher degree of accuracy. I'm in agreement with Bob on this one.