Magnetism vs altitude

  • Thread starter homerwho
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  • #1
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Magnetism as an attractive force can overcome gravity and lift things. I'm suggesting that a horseshoe magnet will overcome gravity and lift things off of the ground. Is there a reduction of magnetic pull with altitude?
 

Answers and Replies

  • #2
494
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Force between two magnets falls off 1/r^4, where r-distance between magnets.

The "magnetic levitation" technology do exist and is generally effective up to 30cm altitude. Google "maglev" for details.
 
  • #3
40
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I've seen the levitating frog in a magnetic field. I asking if a horeshoe magnet and an iron plate stuck to the magnet. Will altitude decay the force on the plate to where the plate falls off of the magnet
 
  • #4
494
197
I've seen the levitating frog in a magnetic field. I asking if a horeshoe magnet and an iron plate stuck to the magnet. Will altitude decay the force on the plate to where the plate falls off of the magnet
Typical horseshoe magnet (hard ferromagnetic) attraction to nearby soft ferromagnetic (iron plate) is independent of altitude.
 

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