1. The problem statement, all variables and given/known data Cart A, with a mass of 0.20 kg, travels on a horizontal air track at 3.0m/s and hits cart B, which has a mass of 0.40 kg and is initially traveling away from A at 2.0m/s. After the collision the center of mass of the two cart system has a speed of: A. zero B. 0.33m/s C. 2.3m/s D. 2.5m/s E. 5.0m/s 2. Relevant equations 3. The attempt at a solution Vcom = [(0.2)(3)+(0.4)(2)]/(0.2+0.4) = 2.3333 but ans says its 0.33 m/s? why?