Question

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 150,000 kg and a velocity of 0.300 m/s, and the second having a mass of 110,000 kg and a velocity of-0.120 m/s. (The minus indicates direction of motion.) After they collide and together, what is their final velocity?

Answer 1