Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsRelated Rates: A Boat Approaching a Dockhttp://demonstrations.wolfram.com/RelatedRatesABoatApproachingADock/]]>http://demonstrations.wolfram.com/RelatedRatesABoatApproachingADock/