Question
\text { Let } E=\frac{m}{2} \dot{x}^{2}(t)+\frac{k}{2} x(t) \text { be the energy of the particle. } Why is this a meaningful choice of the energy? \text { Show that } \frac{\mathrm{d} E}{\mathrm{~d} t}=-m \gamma \dot{x}^{2}(t)
Question image 1Question image 2Question image 3