1F20.55 - Inertia of Rest - Inertia Hat
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.
- 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.
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