Planet X has the same mass as earth, but its radius is only half as big. How does the gravity on this planet compare with the gravity on our planet earth?
2 answers
Duplicate question. Refer to my response elsewhere.
g1 = G•M/R^2
g2 = G•M/r^2
r=R/2
g1/g2=r^2/R^2=1/4
g2 = G•M/r^2
r=R/2
g1/g2=r^2/R^2=1/4