Question

Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth.

Answer 1

Let be the mass of the Earth and m be the mass of an object on its surface. If R is the radius of the Earth, then according to the universal law of gravitation, the gravitational force (F) acting between the Earth and the object is given by the relation: 

F = GM_Em / R²