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

Let 𝑀_𝐸 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 \over 𝑅^2}