Physics

Problem

Which one of the following relations gives the magnitude of acceleration due to gravity

g

at the surface of a spherical planet of mass

M

and radius

R

? a)

g=\dfrac{4 G M}{R^{2}}

g=\dfrac{G M}{4 R^{2}}

g=\dfrac{G M}{R^{2}}

g=\dfrac{2 G M}{R^{2}}