1. The problem statement, all variables and given/known data A 43.0 marble moving at 1.90 strikes a 30.0 marble at rest. What is the speed of each marble immediately after the collision? (vfx)1=? (vfx)2=? 2. Relevant equations v2f=2 m1 v1 / (m1 + m2) 3. The attempt at a solution I tried using the equation above to get the first speed and is not the right answer. I did this 1.9m/s(2(.43)/.43+.30)=2.23m/s that apparently is wrong. Any help?