Physics - Electrostatics Question with Solution | TestHub

A charged particle$\mathrm{q}$is shot towards another charged particle$\mathrm{Q}$(which is fixed) with a speed$\mathrm{v}$. It approaches$\mathrm{Q}$up to the closest distance$\mathrm{r}$and then returns. If$\mathrm{q}$were given a speed$2\mathrm{v}$, the closest distance of approach would be