Drexel dragonThe Math ForumDonate to the Math Forum

The Math Forum Internet Mathematics Library

Classical Dynamics: Spinning Eggs — A Paradox Resolved

_____________________________________
Library Home || Full Table of Contents || Suggest a Link || Library Help
_____________________________________

Visit this site: http://www.nature.com/cgi-taf/DynaPage.taf?file=/nature/journal/v416/n6879/full/416385a_fs.html
Author:H. K. Moffatt and Y. Shimomura, Nature
Description: "If a hard-boiled egg is spun sufficiently rapidly on a table with its axis of symmetry horizontal, this axis will rise from the horizontal to the vertical. Conversely, if an oblate spheroid is spun sufficiently rapidly with its axis of symmetry vertical, it will rise and spin about the vertical on its rounded edge with its axis of symmetry now rotating in a horizontal plane. In both cases, the center of gravity rises." In this "brief communication" article from volume 416 of the journal Nature, Moffatt and Shimomura provide an explanation for this paradoxical behaviour, through derivation of a first-order differential equation for the inclination of the axis of symmetry. Download the article as a PDF, or read a "science update" report of the research which explains the phenomenon in layman's terms.
Levels: College, Research
Languages: English
Resource Types: Articles
Math Topics: Differential Equations, Fluid Mechanics, Mechanics of Solids

[Privacy Policy] [Terms of Use]

_____________________________________
Home || The Math Library || Quick Reference || Search || Help
_____________________________________

© 1994-2013 Drexel University. All rights reserved.
http://mathforum.org/
 The Math Forum is a research and educational enterprise of the Goodwin College of Professional Studies.The Math Forum is a research and educational enterprise of the Drexel University School of Education.