Winamp Forums > AVS Momentum Question

 30th January 2003, 23:38 #1 anubis2003 Forum King     Join Date: Dec 2002 Location: middle of somewhere Posts: 5,564 Momentum Question Here is my question: If given the initial x and y velocities in a 2-D elastic [glancing] collision between two spherical objects, how can you find the final velocities and directions (components or velocity and direction). I believe it has something to do with figuring it out in the n-t axes and then rotating to the x-y axes, but I'm not positive. Any help would be greatly appreciated and I would also like to see the steps required. That way if I try doing it in 3-D I can figure it out myself. Thanks. [Over The Monkey] | [My DeviantArt] | [Seti] | [Atmo Digital Design Forums]
 31st January 2003, 22:36 #2 dirkdeftly Forum King     Join Date: Jun 2001 Location: Cydonia, Mars Posts: 2,651 Another GREAT thing for UnConeD :P He showed the p33pz at #finnish-flash a rather neet physics demonstration that does (if I'm correct) exactly that... "guilt is the cause of more disauders than history's most obscene marorders" --E. E. Cummings
 1st February 2003, 00:39 #3 anubis2003 Forum King     Join Date: Dec 2002 Location: middle of somewhere Posts: 5,564 Yeah, I figured if anyone would know it unconed would. I was only able to find 2 websites that seemed to figure out the problem I'm trying to figure out. One was by a princeton professor, and the other was by some physics professor. It is really easy to do this problem if one of the balls is at rest initially or the paths intersect at 90 degrees or 180 degrees(1-D). Any other angles and it is a glancing collision that is very difficult to solve. [Over The Monkey] | [My DeviantArt] | [Seti] | [Atmo Digital Design Forums]
 1st February 2003, 05:49 #4 UnConeD Whacked Moderator     Join Date: Jun 2001 Posts: 2,104 Lemme dig up my mechanics book later. Right now I have 6 hours to go until physics exam (that's 4cm of paper that should be in my head now , but it isn't) so I don't have much time. But I do give myself 5 minutes to pauze and surf the web (and post comments at lightningspeed)
 1st February 2003, 06:52 #5 dirkdeftly Forum King     Join Date: Jun 2001 Location: Cydonia, Mars Posts: 2,651 yes, telling from "lightningspeed" and "pauze" not to mention how you use don't stop to spell the numbers, which if I'm correct you normally do "guilt is the cause of more disauders than history's most obscene marorders" --E. E. Cummings
5th February 2003, 22:06   #6
anubis2003
Forum King

Join Date: Dec 2002
Location: middle of somewhere
Posts: 5,564
YES! I finally figured it out. Here is a small example. I will turn it into a worthy preset soon and repost. Who knows, if I can figure out the 3-D equations it will definitely be awesome. This took me hours to figure out. But it worked!
Attached Files
 realballs.zip (560 Bytes, 40 views)

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