Vector-Valued Functions Practice Test

With $\mathbf{r}(t)=\langle(v\cos a)t,,(v\sin a)t-4.9t^2\rangle$, what does $\mathbf{r}(2)$ represent in context?

A robot scales a planned 2D path by $S=\begin{pmatrix}2&0\0&1\end{pmatrix}$; which point results from $S\langle 3,5\rangle$?​