This following applet is How to [b]determined the trajectory of a planetary motion?[/b]
Created by prof Hwang Modified by Ahmed
Original project [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=629.0]How to determined the trajectory of a planetary motion[/url]

The question is why I can draw the trajectory when you change the initial condition with you mouse.
(You can drag the red arrow  to change the initial position and magnitude of velocity(vy).
How to determine the trajectory?  Do you know?

/htdocs/ntnujava/ejsuser/37048/users/br/ahmed/KeplerMotion_pkg/KeplerMotion.propertiesFull screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
Download EJS jar file(1082.2kB):double click downloaded file to run it. (18 times by 6 users) , Download EJS source View EJS source