E_{tot} = \frac{1}{2}mv^{2} + \frac{1}{2}ky^{2} + C

E_{tot} = \frac{1}{2}mv^{2} + \frac{1}{2}ky^{2}

KE = \frac{1}{2}mv^{2} U = \frac{1}{2}ky^{2}

E = E_{0}e^{−t/τ}