Home Science Vocabulary Related Links Other Student Websites Mrs. Peck's Physics Site	Action Force: The man's feet push down on the diving block. Reaction Force: The diving block pushes up on the man's feet.

Have you ever wondered why a sumo wrestler never falls through the ground, even when he jumps with all of his weight? Or why you never fall through your chair when you sit down in it? Sir Isaac Newton probably wondered the same thing. Thanks to Newton we are able to answer to all of these questions, and many more, because of Newton’s 3rd Law of Motion. The law simply implies that when object A hits or makes contact with object B, object B pushes back with an equal and opposite force on object A. Sound confusing…? Well don’t worry because this website will explain it all from Newton’s 3rd Law, how it works, and Sir Isaac Newton himself.