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 field strength formula

  1. May 9, 2005 #1
    Q: "The Earths radius is 6700km. Show that the magnitude of the gravitational field strength at a height of 350km above the Earth's surface is about 9 N/kg"

    I got the mass of the Earth which is 5.98E 24
    G the constant = 6.67E -11

    Formula : g= GM/r² , i cant seem to get 9, am I supposed to use the 350km??
     
  2. jcsd
  3. May 9, 2005 #2
    Yeah, at a distance R away, the gravitational force is

    [tex] mg = \frac{GMm}{r^2} [/tex]

    Your distance R is 350km above the earth's surface .
     
  4. Sep 22, 2011 #3
    Make sure your 350km is in metres!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Gravitational field strength formula
Loading...