Physics

Problem

At a point Q located

4.0\times10^{7}\,\text{m}

from the centre of a certain planet, the gravitational potential is

-2.0\times10^{7}\,\text{J\,kg}^{-1}

. What is the magnitude of the gravitational field

g

at Q? a)

0.05\,\text{m\,s}^{-2}

0.5\,\text{m\,s}^{-2}

1.0\,\text{m\,s}^{-2}

2.0\,\text{m\,s}^{-2}