Physics

Problem

Which one of the following expressions represents the gravitational potential energy

U

of a mass

m

located at a distance

r

from the centre of Earth of mass

M

? (Here

G

is the universal gravitational constant.) a)

+\,\dfrac{G M m}{r}

-\,\dfrac{G M m}{r}

-\,\dfrac{1}{2}\,\dfrac{G M m}{r}

-\,m g r