1Q60.30 • Rotational Stability: Rattlebacks and Tops

Location: Cabinet 1

Photo and video of the demo used at the University of Texas at Austin

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Instructions / Notes:

• The Rattlebacks have a smooth ellipsoidal shape. Because of this, they have a tendency to spin counter-clockwise, even when pressed directly downward or spun in a clockwise direction. See the video below.
• This demo also includes variations of tops and yo-yos.
• For example, the tippy tops do not tip over when pushed, but they can flip upside down when spun.
• Note: The LED part of the rocket does not work.

Last updated on July 8, 2026