1. Newton’s Third Law of Motion
Chapter 6
Newton’s Third Law of Motion

2. Force Force is a push or pull
Force is part of an interaction (A pair of forces)

3. Newton’s Third Law
“When an object exerts a force on a second object (action force), the second object exerts an equal and opposite force (reaction force)”

4. Newton’s Third Law

5. More Action-Reaction pairs
Planets – Stars
Vehicles falling in the water
Tug-of-war

6. Doesn’t the action /reaction cancel out?
Equal & Opposite right? Pg ??
Nope. No good.
Action/Reaction act on different Objects!

7. Newton’s Third Law on Different Masses
(cannon) Ma = f = mA (cannonball)

8. When is Newton’s 3rd Law true?
ALWAYS!!!!!