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Relativity - relative velocity

  1. Mar 17, 2016 #1
    Hi,
    Could i please get advice on this problem and confirm that my approach and solution are correct?
    Thanks in advance.

    1. The problem statement, all variables and given/known data

    An enemy space rocket travelling at speed 0.8c towards the planet Zog fires a missile in the direction parallel to its own path. Relative to the rocket, the missile travels at v = 0.6c.

    a)How long will the missile take to reach Zog if it is 2 light years distant (in the rest frame of the planet) at the
    time of firing?

    b) Find the relative speed of the missile to the rocket:

    2. Relevant equations
    upload_2016-3-17_14-35-1.png

    3. The attempt at a solution

    upload_2016-3-17_14-36-44.png
     
  2. jcsd
  3. Mar 17, 2016 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Looks good to me.
     
  4. Mar 17, 2016 #3
    Excellent, thank you.
     
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