Question

Given that:
$T=2\pi \sqrt{\frac{l}{g}}$, express $g$ in term of $T,\pi ,andl$.

Answer 1

$T=2\pi \sqrt{\frac{l}{g}}\Rightarrow T^2=4{\pi }^2\left(\frac{l}{g}\right)\Rightarrow g=4{\pi }^2\left(\frac{l}{T^2}\right)$