## Math in the Physical Sciences## Classical Physics and Mathematics |

## What is Newton’s Law of Universal Gravitation? |

As hard as it is to comprehend, (almost) everything in the universe is attracted to everything else. This physical law is not only one of the most well-known but also one of the most important. Newton’s law states that the gravitational force between two masses, *m* and *M*, is proportional to the product of the masses and inversely proportional to the square of the distance *(r)* between them. In formula form, this is written as follows (note: in some texts, the masses of the two objects are written as *m _{1}* and

*m*

_{2}):G is a constant in nature (also called a universal constant), indicating how strong a gravitational force exists. In other words, the farther away the objects, the less the attraction between the objects.