Algodoo

gives you the angle of the green bar, and spawns balls flying in it's direction. i substract pi/2 from the angle, so the top of the bar is the angle of pi/2(rads) (this makes the balls fly into the direction of the top side instead of the right/left).
the left box on the bar contains the script, the right box just defines the variables bottomx and bottomy.
required global variables are
scene.my.angle
scene.my.bottomx
scene.my.bottomy