1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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

    User Avatar

    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
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook