Physics

Problem

Which expression gives the magnitude of the gravitational field strength produced by an isolated point mass

M

at a distance

r

from its center? a)

\displaystyle \frac{2GM}{r^{2}}

\displaystyle \frac{GM}{2r^{2}}

\displaystyle \frac{GM}{r^{2}}

\displaystyle 4\pi\,\frac{GM}{r^{2}}