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Why does a proton slow down as it movies into higher potential?

  1. Feb 24, 2009 #1
    1. The problem statement, all variables and given/known data
    No real problem statment, just a question.

    I was reading through my textbook and found this statement: "A positive charge slows down as it moves into a region of higher, more positive potential."

    I spend some time thinking about it and I can't figure out why... does more positive potential act kind of like a positive charge or something? Can anyone help?
     
  2. jcsd
  3. Feb 24, 2009 #2

    LowlyPion

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    If you push a positive charge toward a Positive potential will it repel or attract? If it repels you have to do positive work.

    If you have to do positive work, then imagine what a particle with kinetic energy is going to do. Slow down since the force it faces is against it.
     
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