What does Newton's third law state?

Newton's third law states that for every action, there is an equal and opposite reaction. This principle highlights the interaction between two objects: when one object exerts a force on a second object, the second object simultaneously exerts a force of equal magnitude but in the opposite direction on the first object.

This law is fundamental in understanding how forces work in our everyday lives. For example, when a person pushes against a wall, the wall pushes back with an equal force. This is why you don't simply fall through the wall; it is the wall's reaction force that balances your action. This law is crucial for analyzing motion in collisions, propulsion systems (like rockets), and many other scenarios where forces interact.

Understanding this law allows students to evaluate situations where forces are at play and recognize the inherent balance in interactions.