Code Number: 1F20.55

Demo Title: Inertia of Rest - Inertia Hat

Condition: Good

Principle: Inertia of Mass

Area of Study: Mechanics

Equipment:

Inertia Hat

Procedure:

Center inertia hat on the top of your head. As you turn quickly in any direction, the inertia hat should stay in its initial position. With practice you should be able to make 360 degree turns without moving the hat.

References:

Rosemary Russ, "Super Martian Hat", TPT Vol. 41, # 6, p. 368, Sept. 2003.
James Szeszol, Dan Cieslik, "Conservation of Angular Momentum Gadget - Quick and Fun!", TPT, Vol. 27, # 5, May 1989, p. 396.
"Martian Hat", Physics From the Junk Drawer, 3rd Edition, The Science House, North Carolina State University, p. 11.

Disclaimer

These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist. The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose. The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources. Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks. These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage. Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.

Instructional Resources and Lecture Demonstrations

1F20.55 - Inertia of Rest - Inertia Hat

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