1. The problem statement, all variables and given/known data a 480kg car moving at 14.4m/s hits a another car from behind moving at 13.4m/s in the same direction. if the second car has a mass of 570kg and a new speed of 17.9m/s what is the velocity of the first car after the collision?? 2. Relevant equations m1*v1=m2*v2 doubt thats it 3. The attempt at a solution i know its 8.94m/s but why??