Example The passenger car of an amusement park ride is connected by the arm AB to the vertical mast OC. During a certain time interval, the mast is rotating at the constant rate = 1.2 rad/s while the arm is being elevated at the constant rate $ = 0.3 rad/s. Determine the cylindrical components of the velocity and acceleration of the car at the instant when = 40. 6 m C B 4 m 0 R