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Kinetic Energy problem

  1. Feb 16, 2005 #1
    An electron starting from rest acquires 6.3keV of KE in moving from point A to point B. How much KE would a proton acquire, starting from rest at B and moving to point A?

    The answer is 6.3keV. I don't understand why they have the same kinetic energy. Is it becasue proton has more mass and less velocity? :bugeye:
  2. jcsd
  3. Feb 16, 2005 #2

    Andrew Mason

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    I will assume from the question that the electron acquires its energy by being placed in an electric field.

    The reason they have the same energy is because they have the same charge. They experience the same force over the same distance so they acquire the same energy.

  4. Feb 16, 2005 #3


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    Hey,mister,why do you double post...?:grumpy:

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