Meriam, Kraige & Bolton — Kinematics of Particles: Problem 2_107

2/107 A drone flies over an observer $O$ with constant speed in a straight line as shown. Determine the signs (plus, minus, or zero) for $r$, $\dot{r}$, $\ddot{r}$, $\theta$, $\dot{\theta}$, and $\ddot{\theta}$ for each of the positions $A$, $B$, and $C$.