1. At a road intersection, a 2900 kg truck moving to the north at 18.0 m/s collides with a 2000 kg car moving to the west. The two vehicles became entangled after collision and move together at 39.0 north of west from the point of impact. (a) What is the speed of the two vehicles right after the collision? (b) With what velocity was the car moving when it collides with the truck? (c) How much energy is dissipated during the collision?