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Bumper Cars (Posted on 2004-12-30) Difficulty: 3 of 5
Some bumper cars are moving around a circular track at the same constant speed. However, they are not all going in the same direction. Collisions are perfectly elastic, so that two colliding cars instantaneously change directions (and continue at the same speed).

Show that at some point in the future, all the cars will be back to their starting positions and directions. Assume that each car has no length.

See The Solution Submitted by David Shin    
Rating: 2.5000 (4 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Stop the race! Trouble on the track!Steve Herman2013-05-19 09:46:26
SolutionNo SubjectMichael Kornrade2005-11-12 18:00:43
ahhaldfj2005-04-14 22:12:25
No Subjectdavid2005-03-22 13:10:59
SolutionVlad Dracul2005-01-28 01:12:14
re: Solution3llis2005-01-13 13:45:30
re: thoughtCharlie2005-01-01 16:57:18
Some ThoughtsthoughtTristan2005-01-01 16:47:03
Solutionre(2): SolutionCharlie2004-12-31 13:32:58
Questionre: SolutionVee-Liem Veefessional2004-12-31 07:52:09
re(2): Solution -- another way of looking at itLarry2004-12-31 01:54:38
re: Solution -- another way of looking at itCharlie2004-12-30 18:58:58
Around in circlesAvin2004-12-30 18:40:25
SolutionSolutionLarry2004-12-30 18:12:07
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