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Velocity and Gravity Problem. Basic question. NEED HELP

  1. Mar 4, 2012 #1
    1. Deimos, a moon of Mars, is about 12.0 in diameter, with a mass of 2.00×1015 . Suppose you are stranded alone on Deimos and want to play a one-person game of baseball. You would be the pitcher, and you would be the batter!

    With what speed would you have to throw a baseball so that it would go into orbit and return to you so you could hit it?




    2. v^2=GM/R



    3.v = sqrt(6.67*10^-11*2*10^15/12000)
    v = 3.334 m/s

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



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Mar 4, 2012 #2

    gneill

    User Avatar

    Staff: Mentor

    Hi PhysicsScrub, Welcome to Physics Forums.

    What's the difference between radius and diameter? :wink:
     
  4. Mar 4, 2012 #3
    Facepalm.... ahah. thanks dude.
     
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