Newton's law of universal gravitation
Newton's universal law of gravitation is a physical law that describes the attraction between two objects with mass. It is talked about in Isaac Newton's Philosophiae Naturalis Principia Mathematica.[1][2] The law is part of classical mechanics.
The formula is
[math]\displaystyle{ F_{g} = G \frac{m_1 m_2}{r^2}, }[/math]
In this equation:
- Template:Math is the total gravitational force between the two objects.
- Template:Math is the gravitational constant.
- Template:Math is the mass of the first object.
- Template:Math is the mass of the second object.
- Template:Math is the distance between the centres of the objects.
In SI units, Template:Math is measured in newtons (N), Template:Math and Template:Math in kilograms (kg), Template:Math in metres (m), and the constant Template:Math is approximately equal to Template:Val.[3]