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!

Gravitational acceleration

  1. Apr 21, 2005 #1
    At what altitude above Earth's surface would the gravitational acceleration be 3.53 m/s^2?

    I used the equation
    a= GM/r^2
    G=6.67 x 10^-11 and M= 5.98 x 10^24
    Solving for r gives 1.06 x 10^7 m which isn't right... can someone tell me what I'm doing wrong?
  2. jcsd
  3. Apr 21, 2005 #2


    User Avatar
    Science Advisor
    Homework Helper

    Reread the question. You need the altitude above the Earth's surface, not the distance from the center of gravity of the earth.
  4. Apr 21, 2005 #3
    How would I find that since all I know is the acceleration, mass and radius of the Earth?
  5. Apr 21, 2005 #4
    You know r = 1.06 x 10^7 m, the problem isnt asking for 'r'.

    The problem is asking how far from earth's surface. You know 'r' of earth, how high above the earth is r = 1.06 x 10^7m?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Gravitational acceleration