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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

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

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 ...

http://hyperphysics.phy-astr.gsu.edu/hbase/conser.html#cons

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