|This durable Inertia Demonstrator works reliably every time and
is a great improvement on traditional versions of this classic
experiment. A steel ball rests on a thin metal card on top of a
pillar, and a spring-loaded catch is mounted next to the pillar.
When the catch is released, a piston strikes the edge of the metal
card sharply. The card flies out from under the ball, which
remains in place on top of the pillar due to its large inertial
mass. The card is tethered to the aluminum base for easy recovery
after the experiment.
Includes an activity guide.