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Homework Help: Space Shutte Centripetal force problem

  1. Oct 6, 2011 #1
    1. The problem statement, all variables and given/known data

    The space shuttle releases a satellite into a circular orbit 555km above the earth
    how fast must the shuttle be moving when release occurs in m/s?

    2. Relevant equations

    V= square root ((GM)/r)
    r= 555000
    G= 6.67 * 10^-11
    -mass was not given so I am not sure how to plug it in
    -I got that equation but making force of gravity proportional to centripetal force
    Last edited: Oct 6, 2011
  2. jcsd
  3. Oct 6, 2011 #2
    How about you show what you did? That will help to see where you went wrong.
  4. Oct 7, 2011 #3

    I like Serena

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    Homework Helper

    Welcome to PF, mayla1190! :smile:

    You do need some extra information to solve this problem.
    I think you need the radius of the earth, but you can look this up (6000 km).
    From this you can also calculate GM (using g).

    Btw, your r is not quite right, since you've neglected to include the radius of the earth.
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