Answer to Question #289381 in Physics for AFASF

Question

Determine the force of gravitational attraction between the earth (m = 5.98 x 10²⁴ kg) and a 65-kg physics student if the student is in an airplane at 40000 feet above earth's surface. This would place the student a distance of 6.39 x 10⁶ m from earth's center. 

Answer 1

$$F=GMm/(R+H)^2=636\text{ N}.$$