Now calculate (or better yet, have your students calcu-
late) the distance an object falls after 0.04 s, 0.08 s, 0.12 s, etc.
Hang beads at these lengths from the elastic band at inter-
vals around 3 cm. Now, hold the stick horizontally allowing
the beads to hang vertically. The trajectory of a horizontally
thrown object is manifest. Pulling on the elastic causes the tra-
jectory to change as if the initial velocity was increased. The
demonstration shows that while the ball goes further before it
lands, it still lands at the same time.