The acceleration due to gravity at the surface of Earth is g. The radius of Earth is R_E. The distance from the center of Earth to a point where the acceleration due to gravity is g/9 is

Question

Quizplus · Accepted Answer

The acceleration due to gravity decreases with the square of the distance from the center of the Earth. If g becomes g/9, the distance must be 3 times the Earth's radius, hence 3R_E.

The Acceleration Due to Gravity at the Surface of Earth