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

(b)

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

(c)

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

(d)

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