Angular Momentum & Precession: Harnessing Torque?

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Discussion Overview

The discussion centers around the concepts of angular momentum and precession, particularly in the context of a frictionless gyroscope and the potential to harness torque generated during precession. Participants explore the implications of torque interactions between the gyroscope and a generator, questioning the feasibility of converting this torque into usable energy.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant proposes that it might be possible to harness the torque generated by a spinning gyroscope during precession to convert it into kinetic energy, although they express uncertainty about this idea.
  • Another participant questions the direction of the torque vector applied by the generator and how the gyroscope would respond, suggesting that understanding these dynamics would clarify the limitations of energy extraction.
  • A subsequent post reiterates the importance of the torque direction and its effects on precession, suggesting that if the torque opposes precession, it could lead to nutation and potentially cause the gyroscope to fall.
  • In response, a participant asserts that precession continues despite the opposing torque, emphasizing that the gyroscope does not rotate in the direction of the applied torque, which is fundamental to the phenomenon of precession.
  • Another participant expresses confusion about the effects of reaction torque on the change in angular momentum, acknowledging that while precession must continue, they are uncertain about the overall outcome.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the feasibility of harnessing energy from the gyroscope's precession or the implications of torque interactions. Multiple competing views remain regarding the behavior of the gyroscope under applied torque and the nature of precession.

Contextual Notes

There are unresolved questions about the assumptions underlying torque interactions and the definitions of precession and nutation. The discussion does not clarify the mathematical relationships involved in these concepts.

sinr0202
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I am currently studying angular momentum and precession. If you suppose that you had a frictionless gyroscope with the flywheel spinning, thus precessing, could you harness the torque (converted to kinetic energy) generated about the axis of precession? since the force is generated by gravity it seems possible to me.. but then again that fails logic -____-; can someone explain to me why i am wrong?
 
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If gyro applies torque to generator, generator applies opposite torque on gyro. What is the direction of this torque vector? How will the gyro respond to torque in that direction? If you answer these questions correctly, it will become clear why this resource of energy is finite.
 
K^2 said:
If gyro applies torque to generator, generator applies opposite torque on gyro. What is the direction of this torque vector? How will the gyro respond to torque in that direction? If you answer these questions correctly, it will become clear why this resource of energy is finite.

If the torque is in the opposite direction, the precession does not continue, thus it will not be able to change the direction of the angular momentum, and nutation follows. does it just fall then?
 
Precession does continue, actually. Keep in mind that gyro does not rotate in direction of torque. That's kind of the whole reason there is precession. So figure out where the net torque points and new direction of precession.
 
K^2 said:
Precession does continue, actually. Keep in mind that gyro does not rotate in direction of torque. That's kind of the whole reason there is precession. So figure out where the net torque points and new direction of precession.

I have a feeling that the reaction torque will not allow the change in angular momentum to be as much as it would without that reaction torque. But precession must continue.. hmm I'm quite clueless to what happens
 

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