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Homework Help: 2 concept questions on magnetism.

  1. Apr 6, 2008 #1
    1. The problem statement, all variables and given/known data

    http://img231.imageshack.us/img231/5296/physicspd2.jpg [Broken]

    2. Relevant equations

    none really.

    3. The attempt at a solution

    1. I think that the two outside magnets would attach to the middle one and their eventual velocities and accelerations would equal 0 but that seems to easy to me...

    4. I think it's yes because magnetic fields exert forces on any moving charge or current that is present in the field. I know the answer is no for this problem though...
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Apr 6, 2008 #2


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    1. What can one say about the forces on the center magnet?

    If all three magnets are released from rest they accelerate in the direction of magnetic force, until they come in contact with something that prevents their motion.

    In the second problem, what is the significance of a moving charge?
    Last edited by a moderator: May 3, 2017
  4. Apr 6, 2008 #3
    For #1 aren't the poles of the center magnet attracted to the opposite poles of the outside magnets?

    And for #2, does it make sense to say that it's moving in the direction of the magnetic field it can not feel a magnetic force?
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