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Modern Physics (S. Theory of relativity) problem

  1. Sep 9, 2012 #1
    1. The problem statement, all variables and given/known data

    Find the force necessary to give a proton an acceleration of 1.0 10e19 m/s2 when the proton has the following velocities (along the same direction as the force).

    2. Relevant equations
    P=mλu


    3. The attempt at a solution
    Found the derivative of the above equation and got F=mλa, but my answers are been rejected by the school software. I don't know what I did wrong please help.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 9, 2012 #2

    TSny

    User Avatar
    Homework Helper
    Gold Member

    The gamma factor λ depends on u. Since p is proportional to the product of λ and u, you'll need to use the product rule when taking the derivative dp/du in the expression F = dp/dt = (dp/du)(du/dt)
     
    Last edited: Sep 9, 2012
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