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Homework Help: Time dilation and speed.

  1. Aug 5, 2010 #1
    1. The problem statement, all variables and given/known data
    was a home work problem. im redoing it for practice
    im stuck on part c

    2zizsdh.jpg
    this is the hint for part C
    6p3zu0.jpg

    2. Relevant equations

    t=T/(1-(v/c)2)1/2

    3. The attempt at a solution

    my attempt.
    i know that from the restaurant to school it will take 15 min in school's frame and ice cream melts in 5min in the car riders frame..so i did

    (15/60)=(5/60)*(1-(v/c)2)-1/2
    so i solved for v and got c=37.74. which was wrong, do not know where im going wrong.
     
  2. jcsd
  3. Aug 5, 2010 #2
    just figured it out

    the improper time should be 7.5/v then solving for v should be fine.
     
  4. Aug 5, 2010 #3
    bump.
     
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