Inertia Apparatus

This kit contains everything you need for a hands-on demonstration of inertia or Newton's First Law of motion. The instructions include experiment ideas and explain inertia using physics terms like potential energy and acceleration. Use this demonstration again and again as you set a card on top of a post and set the ball on top of the card. When you release the spring it pushes the card out of the way, yet the ball stays sitting on the post.