1. Newton’s Third Law of Motion Chapter 4, Section 3 Pg. 138-140

2. Newton’s Third Law of Motion Forces always exist in pairs (action- reaction pair). “Whenever two objects interact, the force exerted on one object is equal in strength and opposite in direction to the force exerted on the other object.” Single isolated forces cannot exist!

3. Force of the satellite on the astronaut Force of the astronaut on the satellite The most important thing to keep in mind about action-reaction pairs is that each force acts on a different object.

4. Example 2: How does a nail get driven into a piece of wood by a hammer? Force of the hammer on the nail Force of the nail on the hammer Force of wood on nail

5. Assignment Pg. 140 # 1, 2, & 4