The gravitational potential is at a distance above the surface of a spherical planet…

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

Problem

The gravitational potential is

V

at a distance

R

above the surface of a spherical planet of radius

R

and uniform density. What is the gravitational potential a distance

2R

above the surface of the planet? (A)

\frac{V}{4}

(B)

\frac{4V}{9}

(C)

\frac{V}{2}

(D)

\frac{2V}{3}