Are you talking about [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=6.0]circular motion in 3D[/url] or [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=614.0]Spring motion in 3D[/url]?
You are welcomed to check out the above URLs! ;D