You'll need the canvas plugin ...
Big Credits to R0J0 , he made me an example
he path of a jump is not an arc it's a parabola.
Here are two posts with the math of projectile motion:
http://www.scirra.com/forum/trajectory-line_topic52517_post330051.html#330051
http://www.scirra.com/forum/arcing-projectile_topic54153_post338734.html#338734
Here is a capx:
http://dl.dropbox.com/u/5426011/examples14/trajectory.capx
The platform behavior is not exact so the path can't be calculated exactly.
edited><editID>Whiteclaws</editID><editDate>2012-12-18 23:49:20</editDate></edited>