Hi, all. I have created this remix of Roller Coaster written by Michael R. Gallis edited by Wolfgang Christian and content provided by Barbara Christian, Anne Cox, and Mario Belloni. Original source can be found @ [url=http://www.opensourcephysics.org/items/detail.cfm?ID=8228]http://www.opensourcephysics.org/items/detail.cfm?ID=8228[/url]