$(1)$ Amplitude $(2) $ Period $(3)$ Displacement
Of these statements
$ = \frac{1}{2}m{a^2}\left( {\frac{{4{\pi ^2}}}{{{T^2}}}} \right)$
==> $E \propto \frac{{{a^2}}}{{{T^2}}}$
$Y = A \sin (\pi t +\phi)$, where time is measured in $second$.
The length of pendulum is .............$cm$



