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Proper force in relativity

  1. Feb 6, 2013 #1
    1. The problem statement, all variables and given/known data

    Please check the pics.


    2. Relevant equations



    3. The attempt at a solution

    https://mail.google.com/mail/u/0/?ui=2&ik=f891924403&view=att&th=13cb2da10c62fcc6&attid=0.2&disp=emb&realattid=ii_13cb2d9fe9713ffb&zw&atsh=1
    https://mail.google.com/mail/u/0/?ui=2&ik=f891924403&view=att&th=13cb2da10c62fcc6&attid=0.1&disp=emb&realattid=ii_13cb2d9a06e8f8c2&zw&atsh=1
    1. The problem statement, all variables and given/known data

    #8


    2. Relevant equations

    My answer is inverse of tanh

    What's wrong with me?

    3. The attempt at a solution
     
  2. jcsd
  3. Feb 7, 2013 #2

    tiny-tim

    User Avatar
    Science Advisor
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    hi merrypark3! :smile:
    ?? :redface:

    wot pics? :confused:
     
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