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!

Gravitation + forces

  1. Oct 10, 2009 #1
    1. The problem statement, all variables and given/known data

    1.A satellites are placed in a circular orbit that is 1.43 × 10^8 m above the surface of the earth. What is the magnitude of the acceleration due to gravity at this distance

    2. Relevant equations

    1.I used G*mE/r^2

    3. The attempt at a solution

    1. Got an answer of .0195m/s^2 I think I get this and have no idea why it is wrong.
     
    Last edited: Oct 10, 2009
  2. jcsd
  3. Oct 10, 2009 #2

    Doc Al

    User Avatar

    Staff: Mentor

    What values did you use for G, mE, and r?
     
  4. Oct 10, 2009 #3
    Is the satellite [tex]1.43\cdot 10^8 m[/tex] above the surface of the earth, or [tex]1.43\cdot 108 m[/tex] above the surface of the earth?

    Using the former, I got a result only slightly different from yours. Remember that the [tex]r[/tex] in that formula is the distance between the center of the earth and the satellite, not from the surface of the earth and the satellite.
     
  5. Oct 10, 2009 #4
    O thax I didn't realize it was saying above the surface. I meant 1.43x10^8. :)

    using 6.674E-11 for G

    Mof earth= 5.98E24

    r=149380000

    I get an answer of .0179, does that check out?
     
    Last edited: Oct 10, 2009
  6. Oct 10, 2009 #5
    Got it thax
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Gravitation + forces
  1. Gravitation Force (Replies: 4)

  2. Gravitational force (Replies: 1)

  3. Gravitational force (Replies: 2)

  4. Gravitational force? (Replies: 2)

Loading...