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 120,000 kg and a velocity of 0.300 m/s, and the second having a mass of 125,000 kg and a velocity of ?0.120 m/s. (The minus indicates direction of motion.)

Train cars are coupled together by being bumped into one another: Suppose two loaded train cars are moving toward one another, the first havmg a mass of 120,000 kg and a veiOCity of 0300 rn/s, and the second having a mass of125.00D kg and a velocity of 70.120 mfs. (The minus Indicates direction of motion) What is thEIr final velocity {in m/s)? (Enter a number.) E m