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Discover the fact and fiction behind the popular story of Newton sitting under an apple tree.
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 site covers Kepler's Laws of Planetary Motion including his theories on Elliptical Orbits and all three laws of planetary motion.
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
Johannes Kepler, working with data painstakingly collected by Tycho Brahe without the aid of a telescope, developed three laws which described the motion of the planets across the sky.
Animation to look at the 3 Kepler Laws. A series of dots indicate the planet position for equal time intervals. A grid can be added to allow area estimation for law 1.
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.
If a system does not interact with its environment in any way, then certain mechanical properties of the system cannot change. They are sometimes called "constants of the motion". These quantities ...
A biography of Isaac Newton with information on his life and achievments.
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