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Homework Help: Mars orbit around the Sun

  1. Jul 16, 2008 #1
    1. The problem statement, all variables and given/known data

    Mars's orbit has a diameter 1.52 times that of Earth's orbit.
    How long does it take Mars to orbit the Sun?
    in years.

    2. Relevant equations

    I tried using T^2=4(pi)^2r^3/GM

    I got 1.88years...but its wrong...

    3. The attempt at a solution
  2. jcsd
  3. Jul 16, 2008 #2


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    Gold Member

    What makes you think it's wrong?

    Mars' year is 687 Earth days...
  4. Jul 16, 2008 #3


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    Staff Emeritus
    Science Advisor
    Gold Member

    With these things it would help if you showed your work so people can see exactly where you went wrong.

    I think its the radius that is 1.52 times that of Earth's not the diameter. As Dave points out, you're correct.
    Last edited: Jul 16, 2008
  5. Jul 16, 2008 #4
    Thankyou I got it..."masteringphysics" always wants answers in the craziest of ways...
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