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How big does a magnet need to be to move X amount of KGs

  1. Mar 20, 2015 #1
    Hello all,

    I'm working on a little side project to build something close to a Mag-lev system. I've researched loads around the magnets and have the info' on what conditions I need, current, Field strength, etc. But I'm having issues in finding how that relates to the movement of an external object. I was ideally looking for an equation that combines Magnet-motor force into something like F = MA. I'm really struggling on this so if anyone can shed some light on it, that would really be amazing.

    Best regards~
  2. jcsd
  3. Mar 21, 2015 #2

    Simon Bridge

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    Science Advisor
    Homework Helper

    Welcome to PF;
    since you already know how to calculate the force due to a magnet on a load, then you plug that into the F side of F=ma along with the other forces.
    Note: it take zero force to move an object - force is what changes the motion.
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