How Does a Spinning Bicycle Wheel Defy Gravity?

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Discussion Overview

The discussion revolves around the phenomenon observed when a spinning bicycle wheel is held on an axle and remains in a vertical position while rotating. Participants are exploring the underlying principles that explain this behavior, particularly in relation to concepts like gyroscopic motion and precession.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant describes a classroom demonstration where a spinning bicycle wheel maintains a vertical position when held by a string, raising questions about the mechanics behind this behavior.
  • Another participant provides a link to a Wikipedia article on precession, suggesting it may be relevant to understanding the observed phenomenon.
  • A request for clarification is made, asking for an explanation in simpler terms.
  • One participant reiterates the demonstration, referencing a previous post on Physics Forums that discusses similar concepts and provides additional resources for understanding gyroscopic physics.

Areas of Agreement / Disagreement

The discussion does not appear to reach a consensus, as participants are exploring different aspects of the phenomenon and seeking further clarification without resolving the underlying questions.

Contextual Notes

Some assumptions about the mechanics of gyroscopic motion and precession are not fully articulated, and there may be dependencies on specific definitions that are not clarified in the discussion.

AARMA
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In a class demonstration, a bicycle wheel was held on an axle and spun. The result came to be that the wheel while rotating held a vertical position while holding it by a string attached to the end of the axle. After the wheel stopped rotating its vertical position ceased and the wheel attained a horizontal position.

How and why does that happen?
 
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can someone explain with his own words.. :)
 
AARMA said:
In a class demonstration, a bicycle wheel was held on an axle and spun.

On physicsforums:
See this post from november 2010 about https://www.physicsforums.com/showpost.php?p=2992527&postcount=3".


More detailed discussion is in the http://www.cleonis.nl/physics/phys256/gyroscope_physics.php" article on my website.
 
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