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Proton is moving at an alpha particle, distance when it stops

  1. Dec 8, 2016 #1
    1. The problem statement, all variables and given/known data
    an alpha particle with a charge of 2e is fixed at the origin. a proton is aimed at the alpha particle and shot from a distance of 2.00 m at a speed of 3.46x10^6 m/s. How close will the proton come to the alpha particle before coming to a stop?

    2. Relevant equations
    Please help I need to know this for my test!

    3. The attempt at a solution
    Ek=Ee (maybe ?)
     
  2. jcsd
  3. Dec 8, 2016 #2

    gneill

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    Staff: Mentor

    A plea for help is not a relevant equation. Follow through on your suggested solution approach: What equations are relevant here?
     
  4. Dec 8, 2016 #3
    So is it correct that Ek=Ee?
    If that's the case then 1/2mv^2 and kq/r^2 would be relevant
     
  5. Dec 8, 2016 #4

    gneill

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    Staff: Mentor

    The basic idea is correct. You'll have to expand on it though; What conservation rule is involved?
    Yes.
     
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