🍎 Newton's Third Law
The third law is all about pairs of forces. It tells us that forces always come in twos — whenever one object pushes on another, the second object pushes back just as hard!
The Third Law
📜 Newton's Third Law:
For every action, there is an equal and opposite reaction.
This means that when you push on something, it pushes back on you with the same strength, but in the opposite direction. These two forces are called an action–reaction pair.
Action and Reaction in Action
💡 Jumping Off a Boat:
When you jump forward off a small boat, the boat shoots backward! You pushed the boat back (action), and the boat pushed you forward (reaction). Both forces are equal, but they point in opposite directions.
📝 Everyday Examples:
- Swimming: you push the water backward, the water pushes you forward 🏊
- Walking: your feet push back on the ground, the ground pushes you forward 🚶
- A rocket: pushes hot gas down, the gas pushes the rocket up 🚀
- A balloon: lets air rush out one way and zooms off the other way 🎈
Equal but Opposite
The two forces in an action–reaction pair are always:
- Equal in size (same strength)
- Opposite in direction (pointing the other way)
- Acting on two different objects (one on each)
📚 Quick Summary
3️⃣ Third Law
Every action has an equal and opposite reaction
👫 In Pairs
Forces always come in action–reaction pairs
⚖️ Equal & Opposite
Same strength, opposite directions
🚀 Rockets
Push gas out to thrust themselves forward