A moving truck strikes a parked car. During the collision the cars stick together and slide to a stop together. The moving truck has a total mass of 2747 kg (including driver), and the parked car has a total mass of 1068.0 kg. If the cars slide 67.5 m before coming to rest, how fast was the truck going? The coefficient of sliding friction between the tires and the road is 0.400. I know I need to use conservation of momentum somehow. But since I'm not given any of the velocities, how do I go about finding the initial velocity of the truck. Is there another equation out there that I have use?