c
$Kinctic\, energy + potential\, energy = total\, energy$
When kinetic energy is maximum, potential energy
is zero and vice versa.
$Maximum\, potential\, energy = total\, energy.$
$0+K_{0}=K_{0}(\mathrm{K} . \mathrm{E} .+\mathrm{P.E.}=\text { total energy })$