Two pieces of clay are moving directly toward each other. when they collide, they stick together and move as one piece. one piece has a mass of 324 grams and is moving to the right at a speed of 1.15 m/s. the other piece has mass 625 grams and is moving to the left at a speed of 0.87 m/s. what fraction of the total initial kinetic energy is lost during the collision? in other words what is (ke? ? )/ kei?

2. a 1510 kg mid-size car traveling east at 16.4 m/s collides with a 2320 kg mid-size truck traveling north at 31 m/s. assume that the vehicles upon collision lock together in such a way as to prevent them from separating or rotating. calculate the angle northward from due east (counterclockwise) that the locked cars move toward immediately after the impact.