About An open source physics at Singapore simulation based on codes written by Dieter Roess, Francisco Esquembre, Flix Jess Garcia Clemente and Loo Kang WEE. more resources can be found here http://iwant2study.org/ospsg/index.php/interactive-resources/physics/02-newtonian-mechanics/02-dynamics Interesting Fact This app is produce real numbers to coincident with the real world data. Acknowledgement My sincere gratitude for the tireless contributions of Francisco Esquembre, Fu-Kwun Hwang, Wolfgang Christian, Flix Jess Garcia Clemente, Anne Cox, Andrew Duffy, Todd Timberlake and many more in the Open Source Physics community. I have designed much of the above based on their ideas and insights. Network Learn together? FaceBook Fan Page: https://www.facebook.com/Open-Source-Physics-Easy-Java-Simulation-Tracker-132622246810575/ Twitter: https://twitter.com/lookang YouTube: https://www.youtube.com/user/lookang/videos Blog: http://weelookang.blogspot.sg/ Digital Library: http://iwant2study.org/ospsg/