1. The problem statement, all variables and given/known data The radius of the earth is 6400km. A 7200n space craft travels away from the earth. what would be the weight of the space craft at the following distances from the Earths surface: 6400km, 12800km 2. Relevant equations Fg=mg F=Gm1m2/r^2 3. The attempt at a solution Just want to confirm I'm doing this right So first I want to find the mass of the space craft so I use the fg=mg formula. I know that the mass of the earth is 5.98*10^24kg. Gravitational constant is 6.67*10^-11 I use the universal gravitation formula The r will just be the radius of the earth PLUS the distance from the earth's surface. (Converted to m) Then just plug into the equation. Am I doing this right?