A 11.5 kg car is moving towards the right at 5 m/s collides head on with 4.0 kg car moving towards the left at 3 m/s, and they become entangled and move off together after the collision. What is the velocity of the entangled cars after the collision? Be sure to keep at least 4 digits on your answer. Your answer must be within 3% of the computer's answer to be graded as correct. Your