Originally Posted By: paul
btw

the wiki web site says that when a more massive body collides with a less massive body the more massive body does not change its velocity.

and the less massive body then has twice the speed of the more massive body less its original speed.

http://en.wikipedia.org/wiki/Momentum

Quote:
Thus the more massive body does not change its velocity, and the less massive body travels at twice the velocity of the more massive body less its own original velocity. Assuming both masses were heading towards each other on impact, the less massive body is now therefore moving in the opposite direction at twice the speed of the more massive body plus its own original speed.


but surely you want something for your -4000Ns momentum influence !! to use to slow or stop the pipe.

but since were using a 100% elastic collision
you cant have anything to use !!!


No, Paul. Read the preceding line:
"When the first body is much more massive than the other (that is, m1 » m2), the final velocities are approximately given by"

You can use the two equations immediately above that line. Those are exact not approximate. They're what I already used in my program, which you've seen.

Last edited by kallog; 09/27/11 02:05 AM.