g=GM2Rg=\frac{G M^{2}}{R}g=RGM2
g=GMR2g=\frac{G \sqrt{M}}{R^{2}}g=R2GM
g=GMR2g=\frac{G M}{R^{2}}g=R2GM
g=GMR2g=GMR^2g=GMR2
