A radar gun at O rotates with the angular velocity of \dot { \theta } = 0.1 rad/s and angular acceleration of \ddot { \theta } = 0.025 rad/s² , at the instant \theta = 45° , as it follows the motion of the car traveling along the circular road having a radius of r = 200 m. Determine the magnitudes of velocity and acceleration of the car at this instant.