Which of the following expressions gives the acceleration due to gravity at the…

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Which of the following expressions gives the acceleration due to gravity

g

at the surface of a planet of mass

M

and radius

R

? (a)

g = \dfrac{2GM}{R^{2}}

(b)

g = \dfrac{GM}{R^{2}}

(c)

g = \dfrac{4\pi^{2}R}{T^{2}}

(d)

g = \dfrac{GM}{2R^{2}}