1D60.20 Simultaneous Drop
The setup includes the spring-loaded launching device, a tall stand on which to mount it, one solid ball, one ball with a drilled out core, and two pans on the floor for the balls to hit. Mount the device to the stand, cock the spring, and place the balls. When the device is triggered, it will drop one ball vertically and simultaneously launch a second ball horizontally. Using the cubes instead of balls will prevent loss of apparatus.
Location: B1-4. For best effect, use inverted metal trays, O2-4, to ‘catch’ the blocks (good sound effect).