Dear Lord...This again? Congratulations, you guys have managed the incredible, making me hate both physics and pool, I didn't think it possible, but here it is.
Is there ANYONE who can run 3 balls that does not know what is meant by "accellerating through the ball"? What possible misunderstanding can the constant harping on about this and tip contact times be saving us from? OK, OK, OK! We all get it! The cueball stays in contact wtih the tip for a short time. The cuestick decellerates when it hits the cueball. Must we really, constantly bring this up EVERY time we try to discuss pool technique? Maybe next time someone wants to say "accellerate through the ball", "hitting the ball with a level cue", "trying to prolong tip contact" etc the post can automatically be deleted and replaced with a link to Dr. Dave

. God forbid someone could use language that may be imprecise for the purpose of showing someone how to get more enjoyment out of a game...The point is that these are terms everyone can understand through their experience. If I were to just state the physical facts, it would offer no guidance to anyone about how to actually hit a ball. Jerk the cue, decellerate, don't follow through, it's all the same...Why even have a good stance or use wrist action at all.. It's all meaningless just wack the ball any kind of way...What you need is a radar gun, a high speed camera, lasers, mirrors. Forget about what you feel in your hands and see with your eyes, or at least don't try to describe it to anyone, someone might misunderstand you.
You know I generally skip the threads with pool physics, because I don't generally find that sort of technical discussions very helpful, rather the opposite. You know pivot lengths, throw measurements etc. Trying to consciously think about these things is a surefire way to miss IMHO: But then again I tend to stay out of those threads, because I don't want to sabotage them. If some guy wants to solve equations when he tries to make a spot shot with heavy inside, then that is his right (and downfall).
I don't think these constant interjections are meant to be helpful at all. I rather think they are meant to be disruptive and annoying. It's like the grammar Nazis gave up on grammar and became physics Nazis instead. That's just me though, I might be wrong about this.