1. What is Newton’s 3rd Law of Motion?
For every action, there is an EQUAL and OPPOSITE reaction
Forces always exist in pairs
What does equal mean? What does opposite mean?

2. Basically…
For every action, there is a reaction that is EQUAL in magnitude and OPPOSITE in direction

3. Let’s see an example… ACTION: Rocket Gases push DOWN on air. REACTION:
Air pushes UP on rocket.

4. Another example of Newton’s 3rd Law
ACTION:
Wings push DOWN on the air.
REACTION:
Air pushes UP on wings.

5. Another example of Newton’s 3rd Law
ACTION:
Fins push BACK on water
REACTION:
Water pushes Forward on fins.

6. What is an action-reaction pair?
Action – reaction pair = A pair of simultaneous EQUAL but OPPOSITE forces resulting from the interaction of two objects
If the same force is applied to both the hammer and the nail, why does only the nail accelerate?