Train cars are coupled together by being bumped into one another. Suppose two loaded train cars are moving toward one another, t
he first having a mass of 1.62 ✕ 105 kg and a velocity of (0.30 m/s)î, and the second having a mass of 1.11 ✕ 105 kg and a velocity of −(0.12 m/s)î. What is their final velocity (in m/s)? (Express your answer in vector form.)
It is mentioned that train cars are coupled together by being bumped into one another. Let V is the final velocity of the train cars after the collision. It can be calculated using the conservation of linear momentum as :
So, the final speed of the coupled train cars is 0.129 m/s towards x axis. Hence, this is the required solution.