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-   -   equation for magnetic force (https://www.askmehelpdesk.com/showthread.php?t=778405)

  • Dec 12, 2013, 12:12 AM
    neomorcon
    equation for magnetic force
    What is the equation for the force from a magnet needed to move a penny?
  • Dec 12, 2013, 06:56 AM
    ebaines
    This is a trick question. A US penny is composed of copper and zinc, neither of which is magnetic. So the equation for how a magnet affects a penny is force = 0.
  • Dec 12, 2013, 07:32 AM
    ma0641
    Would have to be a WWII steel penny.

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