The formula to find the magnitude of the gravitational force between the Earth and an object on its surface is: F = GMm/R², where:
F: is the gravitational force.
G: is the universal gravitational constant (approximately 6.674 × 10⁻¹¹ N⋅m²/kg²).
M: is the mass of the Earth.
m: is the mass of the object.
R: is the radius of the Earth.