# Average force of gravity

1. Nov 12, 2013

### snakeboy91

Show that the average force of gravity between earth (mass = 6.0 X 10^24kg) and the moon (mass = 7.4X10^22 kg) is 2.1X10^20 N. The average earth-moon distance is 3.8 X 10^8 m

2. Nov 12, 2013

### Ibix

Hi snakeboy, and welcome to PF.

The forum rules require you to show your work before we can help. You are also supposed to use the three headings that appear when you try to post in this section.

3. Nov 12, 2013

### HallsofIvy

Staff Emeritus
Are you not aware that $F= GmM/r^2$?