this is a very good applet that is from
http://www.compadre.org/OSP/items/detail.cfm?ID=8228
Access Rights:   Free access
License: This material is released under the GNU General Public License Version 3.
Rights Holder: Michael Gallis
Record Cloner: Cloned from ComPADRE Item 8227 October 27, 2008 by Wolfgang Christian
Record Updated: Feb 25, 2009 by David Winch

Suppose it will help others in the other forums like this one
http://iresearch.edumall.sg/cos/o.x?ptid=80&c=/iresearch/forum&func=showthread&t=223
acceleration along a curved ramp