A body of weight W is projected vertically upwards from Earth's surface to reach a height equal to nine times the radius of Earth. The weight of the body at that height will be:
Options

Question

A body of weight W is projected vertically upwards from Earth's surface to reach a height equal to nine times the radius of Earth. The weight of the body at that height will be:

G1 Physics · Accepted Answer

At height h = 9R, distance from Earth's centre is 10R. Weight varies as 1/r², so W' = W(R/10R)² = W/100.