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Homework Help: Relative speed between two objects

  1. Oct 26, 2008 #1
    1. The problem statement, all variables and given/known data
    Two jets of material from the center of a radio galaxy are ejected in opposite
    directions. Both jets move at .750c relative to the galaxy. Determine the speed
    of one jet relative to the other.


    2. Relevant equations
    u'x = ux-v/1-ux(v)/c^2


    3. The attempt at a solution
    u' = -.750c - .750c/1-(-.750c)(-.750)/c^2

    Is this the right start?
    Thanks,
    Kevin
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 27, 2008 #2
    Yes, although you might wanna take the absolute value in the end to get a relative *speed*, rather than velocity.

    I'm assuming here you meant to put some brackets in the right places.
     
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