Your Safer Source for Science

Since 1977

Address P.O. Box 219 Batavia, IL 60510
Phone 800-452-1261
Fax 866-452-1436

It’s a race! Investigate the properties of the moment of inertia by rolling differently shaped objects, such as a solid disc, ring, and sphere, down an incline. Discover why the sphere always wins!


  • Newton’s Laws of Motion
  • Kinetic Energy
  • Potential Energy