The owner of my local pool hall asked me if I knew the physics of jumping the cb. I told him that the way the cb jumps on a legal shot is that you drive the cb into the slate with your cue stick. The force of the cb going into the slate makes it bounce off the slate and up in the air. There may be a more scientific explanation than that and if someone, say Bob Jewitt, could respond, I'd appreciate it.
Legal Jump Shot (Bob Jewitt)
- Thread starter Rickw
- Start date
Rickw said:
Rick, I think you gave a solid explanation. Unless you drive the cue ball into the slate, you are scooping it, which is a foul (also worth noting that any stroke in which the ferrule touches the cue ball is a foul).
Like you, I look forward to hearing from Bob on this.
Well I'm not Bob but I will say the term drive it into the slate sounds a bit harsh. Drive it into the slate is what those that can't jump well do. I'm not being a smart a$$ but it's the truth.
Sure you hit down on the c/b relative to what you’re jumping but it is with a relaxed grip, not a hammer grip. LOL If you drive it, it traps the c/b which doesn't let whitey jump as fast. You know when you hit the ball your jumping in the nose. Just a matter of semantics I suppose. The basic description you gave however is good enough to get the point across.
Rod
Sure you hit down on the c/b relative to what you’re jumping but it is with a relaxed grip, not a hammer grip. LOL If you drive it, it traps the c/b which doesn't let whitey jump as fast. You know when you hit the ball your jumping in the nose. Just a matter of semantics I suppose. The basic description you gave however is good enough to get the point across.
Rod
Thanks Rodd. Actually, I do shoot the jumb shot much more like what you're describing. My grip is always loose on the cuestick. I was just trying to explain it in a way that this guy would understand. Btw, I very seldom ever use a jump cue and don't have much of a problem jumping with my regular cue when the jumps aren't too severe.
Rodd said:
It reminds me of a time playing in a tournament. My jump cue rarely sees action. Well I had to drag out the case. I never take out hoppy before any match.
I had to clear the better part of two balls at a fair distance to hit the o/b. I'm thinking how much stroke do I need? I thought i had a fair idea even though I hadn't shot any jumps recently. Well I cleared both balls, no problem. LOL Then I landed almost on the top of the o/b with what seemed to me a fairly easy stroke. Ha Ha, well it was amazing both balls stayed on the table. The end result was a sell out and the guy run out. I guess it pays to practice or at least shoot jumps once in a while.
Rod
I had to clear the better part of two balls at a fair distance to hit the o/b. I'm thinking how much stroke do I need? I thought i had a fair idea even though I hadn't shot any jumps recently. Well I cleared both balls, no problem. LOL Then I landed almost on the top of the o/b with what seemed to me a fairly easy stroke. Ha Ha, well it was amazing both balls stayed on the table. The end result was a sell out and the guy run out. I guess it pays to practice or at least shoot jumps once in a while.
Rod
I read somewhere that jumping a ball is as if you were to throw the ball at the slate at an angle. It would then bounce back off the table into the air.
So the direction of your hit with a jump stick would be like where you were throwing the ball from I suppose.
Or maybe like a bank shot into the rail starting with the cue ball frozen to the rail? Humm... I'll have to try bank shots with a frozen to the rail cue ball and use my jump cue to drive it into the rail and see what happens...
(serendipity - making fortunate discoveries by accident.)
So the direction of your hit with a jump stick would be like where you were throwing the ball from I suppose.
Or maybe like a bank shot into the rail starting with the cue ball frozen to the rail? Humm... I'll have to try bank shots with a frozen to the rail cue ball and use my jump cue to drive it into the rail and see what happens...
(serendipity - making fortunate discoveries by accident.)
I think that describes it. If you drop a ball from six inches or so off the cloth, you can see how high itRickw said:
bounces This should tell you the approximate angle that the ball will leave the cloth for a particular elevation of the stick. (If the bounce is half-height, a 30-degree elevation should get about a 15-degree departure angle for the cue ball off the cloth.) Of course there are a lot of details.
Jumping balls is easy, at least for me. I made my jump cue by cutting down a cheap cue I bought on eBay. It's over 40 inches long, the legal minimum. After testing, I cut the shaft off just behind the ferrule, and installed a phenolic tip. Sawed down the butt too. It jumps like crazy; if I have two balls distance or more between the cue ball and the interfering balls I'm over them, no problem. When I am left safe, I'll shoot a kick first, but if the object ball is tough to nail with a kick, out comes the jump cue. I shoot whichever is the higher percentage shot. My technique is almost always with the dart style stroke. Works like a charm...
Cheers,
Flex
Cheers,
Flex