1. NEWTON’S THIRD LAW OF MOTION AND MOMENTUM

2. NEWTON’S THIRD LAW Describes action-reaction pairs When one object exerts a force on a second object, the second object will exert a force on the first object this is equal and opposite in direction. Or “for every action force there is an equal and opposite reaction force.” Example: When you jump on a trampoline, you exert a downward force on the trampoline. The trampoline then exerts an equal force upward, sending you high into the air.

3. MOMENTUM

4. LAW OF CONSERVATION OF MOMENTUM The momentum of an object doesn’t change unless its mass, velocity, or both change. However, it can be transferred from one object to another. Example: While playing pool, you hit the cue ball into a group of other balls. When the cue ball hits the other ones, it will stop and the other balls will start moving. The momentum of the cue ball was transferred to the other balls. The total momentum of the system is conserved, just transferred from one object to the next. This transfer of momentum from one object to another without being lost or created is the law of conservation of momentum.

5. WHEN OBJECTS COLLIDE If two hockey pucks were moving across an air hockey table in the same direction and one hits the other, the one in front would move off more quickly while the one that hit it will slow down. The two pucks with the same masses were moving in at each other from opposite directions at the same velocity. Once they collide, they will reverse directions and continue to move at the same speed. In both of these cases, the total momentum would be zero.