# Title Image Description Video
1 Inertia Ball

Inertia of Rest

Pull up slowly to overcome the inertia of the heavy ball and break the bottom string. Pull up fast to break the top string.

Have the students guess beforehand which string will break.

Video 1

Video 2

2 Tablecloth pull

Inertia of Rest

Pull the tablecloth out from under a place setting.

Video
3 Persistence of Motion

Inertia of Motion

Level the track. Give the cart a push and watch it bounce end to end along the track. The air track works better, but is noisier.

Video 1

Video 2