Question

What is the newton's law of universal gravitation?

Answer 1

All objects in the universe attract each other in proportion to the product of their masses and inversely proportional to the distance between them.

Two objects of mass `m_1` and `m_2` separated by a distance `r` will attract each other with a force `F` as described by this equation:

`F = G(m_1m_2)/r^2`

Where G is the universal gravitational constant.

`6.673×10^(−11) N m^2/(kg)^2`

Gravity is the weakest of the four known forces. The other forces are the Electromagnetic Force, the Strong Nuclear Force, and the Weak Nuclear Force.

Also see this Wikipedia page.