Gravitational Force

Example: The Earth and the Moon.

• Detail: The gravitational attraction between the Earth and the Moon keeps the Moon in orbit. The gravitational force can be calculated using Newton’s Law of Universal Gravitation: F=Gm1m2r2F = G \frac{m_1 m_2}{r^2}F=Gr2m1​m2​​, where GGG is the gravitational constant, m1m_1m1​ and m2m_2m2​ are the masses of the Earth and Moon, and rrr is the distance between their centers.