Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Physics Help

  1. May 6, 2005 #1
    The Earth has radius of 6,400 km. A satelite orbits the Earth at a distance of 12,800 km from the center of the Earth. If the weight of the satelite on Earth is 100 Kilonewtons, the gravitaional force on the satelite in orbit is

    (A) 11 kilonewtons
    (B) 25 kilonewtons
    (C) 50 kilonewtons
    (D) 100 kilonewtons
    (E) 200 kilonewtons
  2. jcsd
  3. May 6, 2005 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    What do you think? What is the expression of the gravitationnal force?
  4. May 7, 2005 #3
    F = (Gm1m2)/r^2

    u have all the variables

    mass of the earth is 5.98x10^24 kg
    Last edited: May 7, 2005
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook