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Escape Speed Help

  1. Nov 18, 2009 #1
    what is the escape speed from earth for a 7500kg spacecraft?
    radius of earth is 6.38*10m and mass is 5.98*10kg.

    2. Relevant equations
    square root of 2GM/R

    3. The attempt at a solution. I found escape speed to be 3.4*10ms. Is this right?
     
  2. jcsd
  3. Nov 18, 2009 #2
    The radius of the earth is 6.371x106 m.
    The mass of the earth is 5.9742x1024 Kg.

    Your answer is not correct.
     
  4. Nov 18, 2009 #3
    jimmy those were the given values in my test. And am still finding the same answers with yo values
     
  5. Nov 18, 2009 #4

    Doc Al

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    Staff: Mentor

    Show the details of your calculation. (Including the exponents!)
     
  6. Nov 18, 2009 #5
    What value are you using for G?

    G is approximately 6.673x10-11 m3/kg*s2
     
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