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Homework Help: Transfer of Momentum/Kinetic Energy with Magnets

  1. Nov 25, 2012 #1
    1. The problem statement, all variables and given/known data

    A horseshoe magnet of mass m stands on one end of a frictionless table. A steel ball bearing of mass m rolls toward the magnet from far away with velocity v and goes through the magnet and beyond. Assume the force of attraction F changes with distance and is the same in front and behind the magnet.

    a) What is the final velocity of the ball?

    b) What is the final velocity of the magnet?

    2. Relevant equations

    See below

    3. The attempt at a solution

    Honestly, I'm just looking for some help getting started on this one. I'm a very detail-oriented person, so I have trouble seeing the big picture in problems like this and am hoping somebody could lend a hand by giving me a push in the right direction.

    If this sort of thing is frowned upon (since I know some of you don't like when people straight up asking for homework help without proof of them trying first), please, let me know and I'll do my best to fix it or find another way. Any and all suggestions are welcomed and appreciated!
  2. jcsd
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