Does cloth condition affect throw? Specifically will a ball throw more on new cloth because of less ball/cloth friction?
Throw on new cloth
- Thread starter Saturated Fats
- Start date
Yes it has an effect, just like the effect that dirty pool balls have. The cleaner the ball the less it throws.
A new cloth will typically throw less not more.
Well, if it keeps the balls cleaner, you may see less throw.
The critical time of throw -- the time that determines how much off line the object ball will go -- is the time that the balls are in contact. During that time, which is about 1/5 of a millisecond, the balls don't "see" the cloth. That is, the forces between the balls and the cloth are so small compared to the forces between the balls that any force from the cloth will have a negligible effect on where the object ball goes.
No. Throw doesn't make the object ball skid sideways off the line-of-centers - that's a popular misconception. Throw works the same as if you hit the object ball on a different spot (except for the added sidespin), and, like a non-throw shot, cloth condition doesn't change the direction it will go.
There's a similar misconception about "skid" or "cling", which is superthrow caused by chalk or dirt between the balls at their contact point. Cloth condition doesn't affect that either.
(Note: Skid/cling does make the object ball slide a little more than a normal hit, which contributes to the myth that the OB "slides sideways" so therefore cloth condition will affect the OB's direction. But all OBs slide a little when they're hit, with or without throw/skid - the direction isn't changed by the sliding, only the rolling distance.)
pj
chgo
to avoid the sliding effect on the ob, Steve Davis, during some of the wpc commentary, suggested to slightly overcut ( when possible) the ob.
I agree Davis probably wasn't talking about "slide", but about collision-induced throw (I think that's what you mean by "momentum push"). I overlooked that possibility in my response to Slh.
To be clear, overcutting doesn't "avoid" collision-induced throw; it just compensates for it by adjusting your aim accordingly (if the shot will throw the OB to the right, aim to cut it a little more to the left, etc.).
Throw can be "avoided" with outside sidespin (to eliminate the rubbing friction between CB/OB), but that can be tricky because the results are very sensitive to the exact amount of outside spin.
Throw can be reduced a couple of ways:
- hit harder
- use inside (except on fuller shots), top or bottom spin
pj
chgo
WOW! We agree, except for the last parts. How does more momentum reduce momentum push? From my experience & understanding of the physics I was taught, the inside english will actually influence the OB in a similiar direction as the momentum. Can you give me a little background on yourself. PM me if you would prefer.
Those points have been discussed here a lot. Dr. Dave has good summaries on his web site if you're interested in the technical details. Briefly, if a ball is shot harder or with extreme spin, the friction between the balls is reduced and there is less throw. This is what both the theory and experiment show.
"Momentum push" is not a term I've ever seen used before. If you mean "throw" I think it is better to say that as most here are familiar with the term whereas I suspect that no one knows what "momentum push" is.