train car 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 150000 kg and velocity of 0.30 m/sand the second havin a mass of 110000 kg and a velocity of (-0.12 m/s). what is their final velocity

Answer 1

conservation of momentum;

M1V1+M2V2=(M1+M2)V solve for V

Answer 2

0.122 m/s