Newton's Third Law

Newton's Third Law or Newton's third law of motion is the last of the Three Newton's Laws of Motion invented by famous and brilliant mathematician, physicist and astronomer, Sir Isaac Newton. The Three Newton's Laws of Motion shaped how we understand the world.

What is Newton's Third Law of Motion?

Newton's 3rd Law of Motion states that for every action, there is an equal and opposite reaction.

In another word, if there is a Force F on the surface of an object such as the golden ball above, then there is an equal and opposite force exerted back at the same point. This equal and opposite force is often given by negative F.

In the diagram above, when the boxer kicks the golden ball with a force F, there is an equal and opposite force (-F) being applied back at his foot. To sum up Newton's Third Law of Motion:

Formula for Newton's Third Law of Motion

That's it. Action equals reaction is the Famous Newton's 3rd Law of Motion.