Planet X has a gravitational field strength of at its surface
PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
Planet X has a gravitational field strength of 18 N kg−1 at its surface. Planet Y has the same density as X but three times the radius of X. What is the gravitational field strength at the surface of Y?
(A) 6 m s−2
(B) 18 m s−2
(C) 54 m s−2
(D) 162 m s−2