1. CHAPTER 12 – MOTION AND MOMENTUM

2. The total momentum of objects that collide with each other does not change What is the law of conservation of momentum?

3. friction gravity What outside forces could impact a collision? Why “might” these forces be ignored? sometimes the effects of these forces are small

4. bouncing off ex: bowling balls and bowling pins sticking together ex: football players during a tackle What are some ways collisions occur? *Sticking together after colliding, objects still move stuck together, but at different speeds

5. after colliding, two objects bounce off each other, but they may transfer momentum from one to another Bouncing off Total momentum total momentum is the same before and after the collision