Inertia Apparatus, 1 Each

The United Scientific® Inertia Apparatus by United Scientific is a classroom demonstration of Newton's first law. A released metal arm knocks a platform from under a glass ball, and the ball's inertia keeps it in place so it drops onto the support post. The tethered platform resets quickly for repeat demonstrations, and two marbles are included. Used by physical science and physics teachers in middle and high schools.