Earthed

What is the gravitational force between the Earth and the Moon in pounds?

What is the gravitational force between the Earth and the Moon in pounds? If you want the ten points, show how you did the calculations or post a link to where you found the answer.

Public Comments

1. Formula for gravity:
   
   
   
   G = ( m1 * m2 * g ) / ( r ^ 2 )
   
   
   
   m1 = 6 x 10 ^ 24 kg
   
   m2 = 7.3477 x 10 ^ 22 kg
   
   g = 6.67259 x 10 ^ -11 m^3 / ( s^2 * kg )
   
   r = 384,403 km = 3.84403 x 10 ^ 8 m
   
   
   
   Solve for G, G = 1.99 x 10 ^ 20 ( kg * m^2 ) / s^2 ( Newtons)
   
   
   
   Converting to pounds force:
   
   
   
   1 N = 0.224808943 pounds force
   
   
   
   4.48 x 10 ^ 19 pounds force
2. BroncoJoe's method is basically correct, but it would be a lot more clear if he would use the standard notation. He should use G instead of g, and F where he uses G.
   
   
   
   so. . .
   
   
   
   F = G x m1 x m2 / r²