Describe the real-world examples of Newton's third law that were identified in "application's of Newton's laws

When gases escape downward out the tail of a rocket, they push upward on the rocket. When layers of the Earth collide, they force the Earth upward, forming mountains.

As you sit in your chair, your body acts on the chair with one force, and the chair reacts on your body with yet another force. This is an example of Newton's third law in action. Newton's third law states that for every action, there is an equal and opposite reaction.