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Homework Help: Energy needed to connect two repulsive magnets

  1. Mar 7, 2012 #1
    I have a problem that states how much energy would it take to make two repulsive magnets touch if the magnetic repulsive force is 51.7kg per magnet and the mass of magnet 0.515kg and the magnets are 2cm apart. This is the way I tried to solve the problem using the formula for work.

    w= f * d
    f= force
    d= distance

    Since I have two magnets the force between them will be 51.7kg*2kg= 103.4kg
    weight of magnet 0.515kg * 9.8 m/s2 gravity = 5.047 Newtons

    103.4kg * 5.047N * 0.02cm = 10.437 joulse. Is this true or should I have converted the magnetic repulsive force to newtons.
     
  2. jcsd
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