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The Newton Project

A history of Newton and an electronic collection of his writings, some transcribed, some manuscript form. Catalogue of non-scientific papers.

http://www.newtonproject.sussex.ac.uk

Newton's First Law

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.

http://hyperphysics.phy-astr.gsu.edu/hbase/newt.html#nt1

Sir Isaac Newton : The Universal Law of Gravitation

Discover the fact and fiction behind the popular story of Newton sitting under an apple tree.

http://csep10.phys.utk.edu/astr161/lect/history/newtongrav.html

Newton's second law and the physics of the yo-yo

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

http://www.iop.org/EJ/abstract/0031-9120/32/3/019

Kepler's Laws

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.

http://hyperphysics.phy-astr.gsu.edu/hbase/kepler.html#c1

Planetary Motion Kepler's Laws

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.

http://physics.weber.edu/amiri/director/dcrfiles/circularMotion/keplerS.dcr

Newton's Second Law Experiment

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

http://www.walter-fendt.de/ph14e/n2law.htm

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 ...