1. The problem statement, all variables and given/known data What is the gravitational field strength at a point 6.38x106 m above the earth's surface? 2. Relevant equations 3. The attempt at a solution Ok so I plug in all the known variables. G= 6.67x10-11. M= 5.98x1024. r= 6.38x106 and so I multiply that by 2 because the given point is the exact same number as r. Then I powered by two. I calculate both top an bottom of the equation to get g= 39.8866x1013/162.8176x1012. For the answer I get a field strength of 2.449 m/s2. But the answer says that it is 0.622 m/s2. Edit. I was looking at a wrong answer. You got to love my brain sometimes!