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Homework Help: Finding Magnitude of Force of a Nucleus

  1. May 22, 2008 #1
    1. The problem statement, all variables and given/known data
    A nucleus that captures a stray neutron [in a nuclear reactor, for example] must bring the neutron to a stop within the diameter of the nucleus by means of the strong force.That force, which "glues" the nucleus together, is approximately zero outside the nucleus. Suppose that a stray neutron with an initial speed of 1.3 x 107 m/s is just barely captured by a nucleus with a diameter of 1.3 x 10-14 m. Assuming the strong force on the neutron is constant, find the magnitude of that force. (The neutron's mass is 1.67x10-27 kg.)

    2. Relevant equations

    3. The attempt at a solution

    So I do the following:

    v^2 = v0^2-2ad -> 0^2 = 1.3*10^7 - 2a(1.3*10^-14)
    a = -1.3*10^7/(2(1.3*10^-14)) = 2.20385 so * mass = 2.010423077E-5

    But this is incorrect?
  2. jcsd
  3. May 22, 2008 #2


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    Homework Helper

    Hi AnkhUNC,

    It looks to me like you made some math errors in the last line of your work. It looks like you might not have squared the velocity, and maybe more after that.
  4. May 23, 2008 #3
    Yeah I did I worked it out thanks
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