A positive point charge +Q is fixed in space. A negative point charge -q of mass m revovles around fixed charge in elliptical orbit. The fixed charge +Q is at one focus of the ellipse, $\overrightarrow{r}$ is the position vector of negative charge from positive point charge and v its velocity when it is at general point P. The only force acting on negative charqe is the electrostatic force due to positive charge. Then which of the following statements is/are true.