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 of the earth

  1. Oct 23, 2012 #1

    Using the formula g = [itex]\frac{GM}{r2}[/itex] I found 'g' to equal (9.792121683 x 106 [itex]\frac{N}{kg}[/itex])

    The value of g is 9.8 [itex]\frac{N}{kg}[/itex]. I am wondering if I made an error in my calculations or if there is a method of simplifying to get 9.8.

  2. jcsd
  3. Oct 23, 2012 #2

    D H

    User Avatar
    Staff Emeritus
    Science Advisor

    Units. Always check your units. You most likely divided by the square of the Earth's radius in kilometers.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook