Planet X has a mass and radius with gravitational field strength at its surface

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

Problem

Planet X has a mass

M

and radius

R

with gravitational field strength

g

at its surface. Planet Y has mass

3M

and radius

2R

. What is the gravitational field strength at the surface of planet Y? (A)

\frac{2g}{3}

(B)

\frac{3g}{4}

(C)

\frac{4g}{3}

(D)

\frac{3g}{2}