This tag is for questions regarding the Newtonian model of gravity in which the force between two objects is given by $~GMm/r^2~.$ It is a natural phenomenon by which all things with mass or energy – including planets, stars, galaxies, and even light – attract one another. On Earth, gravity gives weight to physical objects, and the Moon's gravity causes the ocean tides.
The Newtonian model of gravity in which the force $(F)$ between two objects of mass $M$ and $m$ situated at a distance $r$ is given by $F=\frac{GMm}{r^2}$, where $G$ is the Gravitational constant and its value is $G=6.674×10^{−11}$ m$^3$⋅kg$^{−1}$⋅s$^{−2}$ (in SI units).
Newtonian concepts also include the gravitational field, the gravitational potential energy, and the gravitational potential.
It is to be noted that gravity has an infinite range, although its effects become weaker as objects get further away.
The gravitational field is the gravitational force divided by mass. The gravitational potential energy is the integral of the gravitational force. The gravitational potential is given by the gravitational potential energy divided by the mass.
Newtonian gravity can also be formulated in terms of Poisson's equation $\nabla^2\Phi=4\pi G\rho$.
