[quote author=ahmedelshfie link=topic=2313.msg8650#msg8650 date=1318331958]
Hi prof,
i try to add slider for have diffrent positions to satellite

thanks,
[/quote]

Hi ahmed
is this what u want?

[quote author=ahmedelshfie link=topic=2313.msg8650#msg8650 date=1318331958]
so will be have also diffrent velocity, for example when satellite be near from earth velocity will be more fast and when be far
velocity will be more slowly, what i need to do that add slider for me control space between satellite and earth to can shown the diffrent velocity when change positions of satellite.
In case that i talk is this satellite motion at [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=2244.0]http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=2244.0[/url]
Also i need to know how when i change position the satellite trace change automatic too.
[/quote]
prof hwang already has physics equation inside if u just want to change the initial position of y it is quite easy, check the jar file.

/htdocs/ntnujava/ejsuser/14019/users/Eg/ahmed/satellitemotion1_pkg/satellitemotion1.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(3098kB):double click downloaded file to run it. (3 times by 2 users) , Download EJS source View EJS source