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Proton speed needed to circle the earth

  1. Jun 30, 2009 #1
    1. The problem statement, all variables and given/known data

    Assume that Earth’s magnetic field is every-
    where perpendicular to the path of a proton
    and that Earth’s magnetic field has an inten-
    sity of 4.19 × 10−8 T.
    What speed would a proton need to achieve
    in order to circle Earth 1550.0 km above the
    magnetic equator?
    Answer in units of m/s.



    2. Relevant equations

    r=m*v/Q*B
    r=(r earth + r given in the question )

    3. The attempt at a solution

    i solved for v but im not sure if what im doing is correct
     
  2. jcsd
  3. Jun 30, 2009 #2

    rl.bhat

    User Avatar
    Homework Helper

    You are in right track.
     
  4. Jun 30, 2009 #3
    thanX
     
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