# Gravitational/Electric field

[center]﻿[/center][justify]This simulation shows the vector field defined as[br]﻿$\mathbf{F}=-\frac{w_0\mathbf{r}}{r^3}=-w_0\left(\frac{x}{\left(x^2+y^2+z^2\right)^{\frac{3}{2}}},\frac{y}{\left(x^2+y^2+z^2\right)^{\frac{3}{2}}},\frac{z}{\left(x^2+y^2+z^2\right)^{\frac{3}{2}}}\right)$[br]﻿﻿This field is associated with gravity and electrostatic attraction. The gravitational field around a planet and the electric field around a single point charge are similar to this field. The field points towards the origin, when $w_0>0$, and is inversely proportional to the square of the distance from the origin.[br][br]Activate the box 'Particles' to start the animation. You can also change the values of $w_0$ by activating the box 'Field'.[/justify]