Double-click on the movie to PLAY.

Click once to PAUSE.

RELOAD the page or double-click to return to the START of the movie.

B at (7.83, 6)

This shows the position of B for which the ball returns to point P. Did you find this using the JAVA-A or JAVA-A-trace worksheet?

The path traced by the ball seems to form a parallelogram (or part of one). Why?

On the next pages we explore what happens to the desired position of B when the postion of P is changed in systematic ways.
Can you find any patterns or rules?

We finish with some pages that illuminate what's going on!