A particle of mass m approaches a stationary particle of mass 3m. They bounce off elastically. Assume 1D. Find the final velocities using the center of mass coordinate system.
(All quantities with r or v are vectors r1 and r2 represent the vectors from the origin to each particle.)
Coordinates of the Center of mass vector.
Coordinates from vector 2 to vector 1
The Attempt at a Solution
Those equations are from my notes/book. I applied them so..
I really do not know how to solve for velocities this way. It is late and maybe I am having a brain fart but how am I supposed to use the conservation of momentum relation to find velocity if it always equals zero in this coordinate system? All I have to work with is the conservation of energy. Can anyone help me out? :(??