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Rattleback

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Product Info

A rattleback is a unique and inexpensive science demonstration that seems to defy physics. Simply spin the rattleback clockwise with a gentle twist of the fingers and within a few seconds the rattleback will stop, and then reverse directions! No tricks, it's all science. Spin it counter-clockwise and it will spin without reversing. But wait, there's more...just tap either end of the rattleback and it will begin spinning counter-clockwise. Not bad for a simple plastic shape. The unique design of the rattleback combines the pitch and roll of the rattleback to cause its energy to shift directions. Each colorful rattleback measures 4 inches (9.5 cm) long.

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Rattleback (00:29)
  • Rattleback
    Filmed by James Cuervo 2011

 

Product Reviews

  1. Rattleback Rave

    Posted by Unknown on 01 27 2014

    A most unusual object.
    Almost magical the way it seems to have a mind of its own.