Quote:
Originally Posted by Uncle Martin
A magnet and gravity can both perform a work function without any introduction of, or loss of any energy. Would you consider this an accurate statement?
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Over a finite distance, yes.
Gravity and magnetism do indeed pull on stuff without having to supply energy.
But gravity and magnetism "perform a work function" only by converting a potential energy into kinetic energy -- over a finite distance.
For either of those forces to work indefinately, you would need either:
the original potential energy to be infinite, or,
the working distance to be infinite.
Neither one is gonna happen.
