1. Newton’s Third Law of Motion

2. Action and Reaction Newton’s Third Law of Motion-
For every action there is an equal and opposite reaction.
If one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction.

3. Action and Reaction Action and Reaction Forces Don’t Cancel
Forces exerted by two objects is called action-reaction force pair
Don’t cancel because they act on different objects
Forces can only cancel if they act on the same object
Read P

4. Momentum “quantity of motion”
A relation between a moving object and it’s mass and velocity combined
Momentum = Mass X Velocity
Momentum is conserved unless acted upon by an outside force! “Conservation of Momentum”