Question

A body weighs 63N on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to half the radius of the earth?

Answer 1

Let g_h be the acceleration due to gravity at a height equal to half the radius of the earth (h = R/2) and g its value on earth’s surface. Let the body have mass m, we know that

Let W be the weight of body on the surface of earth and W_h the weight of the body at height h.

Then,