Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsAtwood's Machine with Rotational Inertiahttp://demonstrations.wolfram.com/AtwoodsMachineWithRotationalInertia/]]>http://demonstrations.wolfram.com/AtwoodsMachineWithRotationalInertia/