Two girls Sita and Gita are skating towards each other on smooth ice along parallel lines as shown in figure. The distance between the lines is $\mathrm{l}$. The mass of two girls are ${\mathrm{m}}_1$ and ${\mathrm{m}}_2$ $\left({\mathrm{m}}_1 <{\mathrm{m}}_2\right)$ and their respective velocity are ${\mathrm{v}}_1$ and ${\mathrm{v}}_2$ $\left({\mathrm{v}}_2>{\mathrm{v}}_1\right)$ . One of the girls holds a stick of length $\mathrm{l}$ and negligible mass. When the girls pass each other, second girl grasps the stick and the girls move together, each of them on either side of the stick. Mark the correct statements