Question 1 (2 points) Train cars are coupled together by being bumped into one another. Suppose two loaded train cars are moving toward one another, the first having a mass of 8. 00 X 107139 and a velocity of 0. 50 m/s and the second having a mass of 5. 00 X 107169 and a velocity of {1. 00 m/S ). What is their final velocity? Your