# Gravitational filed

1. Jun 8, 2010

### seto6

been a while since i have done physic... for got how to calculate gravitational filed...

<THIS IS NOT A HOMEWORK QUESTION>

2. Jun 8, 2010

### dulrich

Gravitational force : F = GMm/r^2
Gravitational potential : U = -GMm/r

3. Jun 8, 2010

### Vortico

$$-G \frac{m_1}{r^2}$$
or in vector form, which I prefer to use:
$$-G \frac{m_1}{\left\| \boldsymbol{r} \right\|^2} \boldsymbol{\hat{r}} \,.$$