At a point Q located from the centre of a certain planet

PHYSICS · Single correct · CBSE · Physics · Gravitation · Gravitation

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}

(b)

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

(c)

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

(d)

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