At time $t=0$, the block is released from position $x=0$, $y=0$ and starts to slide down the incline. At $t=0$, the block's velocity is zero. Assume that friction can be neglected. Where is the block at time $t=$  seconds? (The acceleration of gravity is 9.81 m/s².)

\( \vec{r}= \) \( \hat{x}+ \) \( \hat{y} \) [m].