Problem 4 A truck (M = 1.05-10* kg) traveling at 20.0 m/s loses control and runs into the back of a car (m = 850 kg) which is only traveling at 5.00 m/s, in the same direction as the truck. After the collision, the car is moving in the same direction at a speed of 15.0 m/s and separate from the truck. a) What is the final velocity of the truck? [10 points] b) What is the momentum change of the car? [10 points]