Remember to think about what you are given and what is happening in the problem to pick a coordinate system. 1 A radar is tracking a rocket. At some instant of

time, the distance, r, and angle, 0, are measured as 10 mi and 30°, respectively. From successive measurements, the derivatives, r, , 0, .. and are estimated to be 650 ft/s, 2 2 165 ft/s, 0.031 rad/s, and 0.005 rad/s, respectively. Determine the velocity and acceleration of the rocket.