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Homework Help: Speed of two protons (I think an easy question)

  1. May 7, 2008 #1
    [SOLVED] speed of two protons (I think an easy question)

    1. The problem statement, all variables and given/known data

    If you release two protons from rest 1.500nm apart, calculate the top speed, relative to you, that either proton will achieve.

    2. Relevant equations


    ke^2/r=mv^2 where k=9.0e9 Nm^2/C^2 and e is the charge

    3. The attempt at a solution

    mass proton = 1.67e-27
    charge proton = 1.60e-19

    So just plug in and solve for v=

    v= [(9e9)((1.6e-19)^2/(1.5e-19))/1.67e-27]^1/2

    v=9.59e3 m/s

    I just wanted to make sure the process I used for this problem was correct...

  2. jcsd
  3. May 7, 2008 #2


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    Staff Emeritus
    Science Advisor
    Homework Helper

    Looks good.

    Just one typo ( r = 1.5e-19 ? ), but you did use the right number in the calculation.
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