1. The problem statement, all variables and given/known data This is a lab, I think I want to find if momentum is conserved after collision (data for proof). 2. Relevant equations Change Y = Vit + .5at^2 M1V1=M2V2 3. The attempt at a solution I found that time is equal to 0.515 seconds from using that equation. -1.3M = 0 + .5(-9.8m/s^2)t^2 I don't know what to do next... I got the distance where the balls collide and landed, and where the it would originally land if it didn't collide.