S=1/2gt^2 solve for g
\(S=\frac{1}{2}*gt^2 \\ \\ gt^2=\frac{S}{\frac{1}{2}} =\frac{S}{1}*\frac{2}{1}=2S \\ \\ gt^t=2S \\ \\ \boxed{g=\frac{2S}{t^2}}\)
