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Homework Help: A question about relativity

  1. Mar 31, 2008 #1
    1. The problem statement, all variables and given/known data

    A Vorlon vessel traveling at a speed of 0.975c passes by the Babylon 5 space station( engineers that designed the station quote its length at 8.0645km).

    A Starfury is released from the space station moving with a speed of 0.2c towards the incoming Vorlon vessel.

    What is the observed size of Babylon 5 space station for all observers involved?

    for " observed size", does it mean the length of space station...

    how can i do the addtion in relativistic situation?

    thx, i need help from you guys

    thx so much
  2. jcsd
  3. Mar 31, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Yes, as measured by each observer.
    What addition?
  4. Mar 31, 2008 #3

    do we need to use this formula

    V stands for speed
  5. Mar 31, 2008 #4

    Doc Al

    User Avatar

    Staff: Mentor

    You'd need that formula for relativistic addition of velocity if you wanted to find the relative velocity of the Vorlon vessel and the Starfury. But that's not relevant here.

    Since you're asked to find the observed size of the space station, you need the speed of the observers relative to the space station.
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