1. Two carts on a straight track collide head on. The first cart was moving at 3.5 m/s in the positive x direction and the second was moving at 2.5

m/s in the opposite direction. After the collision, the second car continues moving in its initial direction of motion at 0.5 m/s. If the mass of the second car is 5.0 times that of the first, what is the final velocity of the first car? [2 pt]