Let $\vec{r}, \vec{V}$, and $m$ be position vector, velocity vector, and mass, respectively in a control mass system. Which one of the following properties is considered as conserved extensive property in Reynolds Transport Theorem to obtain the angular momentum equation?
- $\vec{r} \times m \vec{V}$
- $\vec{r} \times \vec{V}$
- $m \vec{V}$
- $m$
