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Homework Help: Special Relativity and spaceships

  1. Feb 26, 2013 #1
    1. The problem statement, all variables and given/known data
    Two identical spaceships,each 200 m long in its rest frame pass one another travelling in opposite directions.According to a passenger in one of the spaceships,the relative velocity of the two spaceships is 0.58c.

    2. Relevant equations

    3. The attempt at a solution
    What the length of each spaceship in a reference frame in which both are of equal length?
  2. jcsd
  3. Feb 27, 2013 #2


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    you need to have a go at the problem yourself, before we can offer advice. think about what equations you need to use.
  4. Feb 28, 2013 #3
    I don't know but it may be length contraction.
  5. Feb 28, 2013 #4


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    A "reference frame in which both are of equal length" is one in which the two space ships have the same speed. What would that be?
  6. Mar 1, 2013 #5


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    yes. The problem is about length contraction. And as HallsofIvy is saying, you need to work out what is the transform to a frame where both ships are travelling at same speed. Then you can use this to work out what is the length of the ship in this frame.
  7. Mar 1, 2013 #6
    Thank you so much for your advices
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