Calculate the force of gravity on a spacecraft 32000 km (5 earth radii) above the Earth's surface if its mass

Question

Calculate the force of gravity on a spacecraft 32000 km (5 earth radii) above the Earth's surface if its mass is 1900 kg.

____________N (toward the earth)

(I can't figure this out! I know I have the right equation but it just isn't working!) Please HELP!

Answer 1

Total distance from center = 6Re
a = g/6^2 = 0.27222 m/s^2 (assuming g=9.8)
F = ma = 517.222 N