Question

The formula to determine the period of one swing of a simple pendulum is T

Answer 1

$\begin{gathered} T=2\pi\sqrt[]{\frac{L}{g}} \\ \text{square both sides} \\ T^2=4\pi^2\frac{L}{g} \\ \text{cross multiply} \\ T^2g=4\pi^2L \\ \text{divide both sides by T}^2 \\ g=\frac{4\pi^2L}{T^2} \end{gathered}$