1. The problem statement, all variables and given/known data Cart1, with mass m, is initially at rest and is struck by cart2, which has a mass of 337 kg and initial speed of 2.07 m/s. The collision is elastic and after the collision cart2 continues to move in its original direction at 0.900 m/s. Find m, the mass of cart1. Find the velocity of cart1 after the collision. 3. The attempt at a solution I tried using standard momentum equations and isolating for m1 but I can't seeing as I don't have u1 or m1. Once I find the mass, the second part of the question should be straightforward. Thankyou for your help!!