The following is a simulation for a real physics demonstration.

A ball is placed in the funnel and the funnel cocked by compressing a spring. The track is raised at one end so that when it is released the cart accelerates down the track. At a certain point a bump below the track trips a lever, releasing the spring and ejecting the ball perpendicular to the track.
Where will the ball fall?

   * (a) The ball will fall in front of the funnel.
   * (b) The ball will fall behind the funnel.
   * (c) The ball will fall IN the funnel.

VIEW or DOWNLOAD ejs xml source
then click to translate strings for selected locale.

Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop.

[b:601ec2c994]You can drag the left slider to change the angle of the track. [/b:601ec2c994]
You can check out for a real demonstration or click the above picture to watch the movie.