Physics 1 - Actions, Reactions, and Newton's Third Law

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Newton's laws are key to understanding motion and how forces on an object can impact its motion. So far all the laws have been about a single object and the impact of outside forces upon it. With the first law, Newton showed that a body in motion remains in motion and a body at rest remains at rest. The second law stated that the acceleration of an object is dependent upon two variables: the net force acting upon the object and the mass of the object. With his third law, Newton focused on what happens when a body exerts a force on a second body.  You probably have heard this in its simplest form: "For every action, there is an equal and opposite reaction." Watch as Professor Pollock demonstrates Newton's Third Law in today's free Physics 1 video. Also, don't forget to check out a past Physics in Action video that gives you a better look at how Newton's third law works.


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This page contains a single entry by April Stockwell published on February 9, 2011 2:21 PM.

Physics 1: Introduction to Newton's Second Law was the previous entry in this blog.

Physics 1 - Solving Problems Using Newton's Laws: Ropes and Tension is the next entry in this blog.

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