Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsNonlinearized Motion of a Simple Pendulumhttp://demonstrations.wolfram.com/NonlinearizedMotionOfASimplePendulum/]]>http://demonstrations.wolfram.com/NonlinearizedMotionOfASimplePendulum/