Spin mass in a vacuum, efficiency?

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SUMMARY

The discussion centers on the concept of spinning a neodymium (neo) magnet ball at 10,000 RPM within a vacuum environment to minimize friction. Participants explore the effects of air resistance and magnetic field interactions on the longevity of the spin. It is concluded that while a vacuum reduces air friction, other factors, such as magnetic field changes, will still cause energy loss, preventing perpetual motion even in a near-perfect vacuum.

PREREQUISITES
  • Understanding of neodymium magnets and their properties
  • Knowledge of vacuum physics and its effects on friction
  • Familiarity with rotational dynamics and RPM measurements
  • Basic principles of magnetic fields and energy loss
NEXT STEPS
  • Research the principles of magnetic levitation and its applications
  • Explore the concept of friction in vacuum environments
  • Study the effects of magnetic field interactions on energy loss
  • Investigate advanced vacuum technologies for achieving near-perfect vacuums
USEFUL FOR

Physicists, engineers, and hobbyists interested in magnetics, vacuum technology, and rotational dynamics will benefit from this discussion.

supak111
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Hey guys I was wondering what would happen if:

took a ball neo magnet, balanced it on a few other magnets to basically make it a frictionless bearing. Then spin the ball magnet to 10k rpm. But do all this in a box that's a vacuum.

Would the neo ball magnet spin basically for a VERY long time since there is no or very little friction since it probably wouldn't be a 100% vacuum?

What if you could make the box be 100% vacuum, would it spin forever?
 
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Air isn't the only source of friction. Even with a levitated magnet, its magnetic field will be changing relative to the magnetic fields it is being supported by. That is cause a loss of energy- i.e. friction.
 

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