Request: looping with energy and normal force <br /><br />For educational use I am looking for an applet like [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=693.0]http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=693.0[/url] &nbsp;Pity, I can see only the snapshot. The applet self stays black.<br /><br />In the request applet I would like to see Gravity force, Normal force and centripetal force, changing during the motion in for example a perfect circular looping of a coaster.<br /><br />Switch on/off the influence of energy: speed in relation to height. If speed gets to low mass leaves circular motion for a time to perform a ballistic curve.<br /><br />Displayed &nbsp;bars for actual kinetic and potential energy<br /><br />Changes user can make: changes in mass, speed . <br />Radius may stay constant.<br /><br />I searched Internet for it but did nothing find.<br /><br />Who is willing to spent time to program this?<br /><br />Thanks<br /><br />