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Newton's Third law: All forces in the universe occur in equal but oppositely directed pairs.
Find out how Newton's third law works and how it affects everything from a rocket taking off to someone firing a gun.
Philosophical essay on Newton's ideas
How do forces help a bird fly or a fish swim? A comprehensive explanation of Newton's third law of motion, with a quiz to test your knowledge at the end.
Discover the fact and fiction behind the popular story of Newton sitting under an apple tree.
A history of Newton and an electronic collection of his writings, some transcribed, some manuscript form. Catalogue of non-scientific papers.
Newton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.
This journal article presents an alternative formulation of Newton's second law applicable to the solution of rolling, rigid body problems e.g. yo-yo's
Download a Java Applet simulating an air track experiment (with variable friction) in which a glider is accelerated by a weight hanging over a pulley - demonstrating Newton's 1nd Law
Definition of Newton's rings from Eric Weisstein's World of Physics.
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