This is a homework that has me completely stumped. If anyone help me out here, I would greatly appreicate it.
A billard ball is east at 2.0 m/s. A second, idential ball is shot west at 1.0 m/s. The balls have a glancing collision (not head-on), deflecting the second ball by 90 degrees and sending it north at 1.41 m/s.
1) What is the speed of the first ball after the collision?
2) What is the direction of the first ball after the collision? (in degrees below the +x axis)
We're studying momentum and collisions in 1D and 2D, so I assumed that this should be that particular type of problem, but since no mass numbers are given for either ball, I'm lost as to where to start.