Euler's Disk

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

Euler's Disk is a trademarked scientific educational toy used to illustrate and study the dynamic system of a spinning and rolling disk on a flat or curved surface. Invented between 1987 and 1990 by Joseph Bendik, it has been the subject of several scientific papers.

Excerpt from the Wikipedia article “Euler's Disk”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: AndrewDressel, CC BY-SA 3.0, via Wikimedia Commons.