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Perfectly centered break of a perfectly aligned pool ball rack (Computer simulation: 8-ball)
Wolfram | Mathematica ^ | 1/8/15

Posted on 01/08/2015 7:23:16 PM PST by LibWhacker

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To: M-cubed

Amen. When one can complete a break holing the 8 ball most of the time, or the 9 ball if your playing that game, you are a champion. Good luck. Those of us who are pool players know damn right well you can’t sink the 8 or 9 ball every time. I prefer slightly to the right of center when breaking.


21 posted on 01/08/2015 8:42:50 PM PST by deweyfrank
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To: LibWhacker

Well....let’s inject the variable of reality in here.

A “perfect break” first requires a “perfect rack”, and that not that easy to come by.

If you have new felt, that’s a good start, so the balls don’t move apart when you release the rack.

Next YOU have to be able to set the rack perfectly square, and that just isn’t a natural happening.


22 posted on 01/08/2015 8:54:27 PM PST by G Larry (Amnesty imposes SLAVE WAGES on LEGAL immigrants & minorities)
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To: LibWhacker

Should be more like the 8 ball in the corner pocket on the break!


23 posted on 01/08/2015 8:58:02 PM PST by US_MilitaryRules (The last suit you wear has no pockets!)
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To: US_MilitaryRules

Oh yea, I did it once.


24 posted on 01/08/2015 8:59:48 PM PST by US_MilitaryRules (The last suit you wear has no pockets!)
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To: LibWhacker

Given that the 11 and 15 balls dropped in, the next shot is the 1-5-8 combo left bottom pocket for the win!

Yeah, easy for me to say.lol


25 posted on 01/08/2015 9:00:21 PM PST by smoothsailing
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To: norwaypinesavage

And a “perfect spin” on the balls. Which are frictionless too.

Ain’t gonna happen.

But is kind of cool. I like the 3x on the bottom moving side-by-side together.

Like a climate model. Here is the computer simulation for the next 85 years. But they are both based on “perfect physics”


26 posted on 01/08/2015 10:01:21 PM PST by Robert A Cook PE (I can only donate monthly, but socialists' ABBCNNBCBS continue to lie every day!)
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To: Political Junkie Too
Wow! I loved that pinball game.

Reminds me of going to the Ground Round when I was a kid.

27 posted on 01/08/2015 10:58:45 PM PST by boop (I never use the words democrats and republicans. I use liberals and Americans.)
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To: Yardstick
Very cool. Interesting that some of the balls wind up rolling in the “upstream” direction.

Same reason they would bounce off a concrete floor - mass "below" is greater than force/impetus from "above". Putting top spin on the cue ball can force it to re-hit those still in the way and give you some extra action.

28 posted on 01/09/2015 4:26:39 AM PST by trebb (Where in the the hell has my country gone?)
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To: Robert A. Cook, PE
"And a “perfect spin” on the balls."

Good one. Spin and translation would require a lot of subtle modeling and parameters to get right. There's probably skidding before they match, and that would involve both dynamic and static friction. I suspect no spin and, of course, no friction.

29 posted on 01/09/2015 4:27:04 AM PST by norwaypinesavage (The Stone Age did not end because we ran out of stones)
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To: Brother Cracker

now that’s funny.....I don’t care who you are


30 posted on 01/09/2015 4:29:47 AM PST by bert ((K.E.; N.P.; GOPc.;+12, 73, ..... Obama is public enemy #1)
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To: Lurkina.n.Learnin
"I used to do it all the time but I was drunk and don’t remember how."

My window of opportunity is between 3 and 6 beers... ;-)

31 posted on 01/09/2015 6:37:45 AM PST by Hatteras
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To: deweyfrank

The black ball in snooker is the 7


32 posted on 01/09/2015 6:47:36 AM PST by MisterArtery
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To: Brother Cracker

33 posted on 01/09/2015 7:42:11 AM PST by Daffynition ("We Are Not Descended From Fearful Men")
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To: LibWhacker

If it’s eight ball the eight is in the wrong place in the rack looks like they are in numerical order top to bottom left to right. The eight ball (black one) should be in the middle where the five is. (the orange one).


34 posted on 01/09/2015 9:11:29 AM PST by edzo4 (You call us the 'Party Of No', I call us the resistance.)
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To: Daffynition

35 posted on 01/09/2015 11:26:28 AM PST by Brother Cracker (You are more likely to find krugerrands in a Cracker Jack box than 22 ammo at Wal-Mart)
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To: Political Junkie Too
I hated that game.

Didn't play it ... A bar I frequented had it on on the way to the restroom. Every time you walked by, it would start trash-talking you. I always assumed it had some sort of motion sensor.

36 posted on 01/09/2015 11:38:57 AM PST by NorthMountain (No longer TEA Party ... I'm the TAF Party)
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To: Brother Cracker

37 posted on 01/09/2015 12:46:04 PM PST by Daffynition ("We Are Not Descended From Fearful Men")
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To: LibWhacker
Yeah but who racked em' ? Takes a perfect rack to get a perfect break.

I know I know, it's a hypothetical conversation starter. Not trying to be a Debbie Downer. I get plenty disappointed when I think I've given my opponent a good rack and it comes out dead.

38 posted on 01/09/2015 12:57:58 PM PST by freepersup (Patrolling the waters off Free Republic one dhow at a time.)
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To: LibWhacker

It would be interesting to see a sensitivity analysis of that break, showing what happens when you’re n millimeters off a direct hit. or when a ball is n millimeters out of position.


39 posted on 01/09/2015 6:15:53 PM PST by AZLiberty (No tag today.)
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To: trebb

It seems to me that the only way that could happen is if they modeled the balls as being not 100% rigid or with finite spaces between the balls. Which goes against my own assumption about the model, which is that they assumed 100% rigidity and no spaces. Of course I could be wrong.


40 posted on 01/09/2015 6:27:23 PM PST by Yardstick
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