The base structure of the firetruck ladder rotates about a vertical axis through O with a constant angular velocity Q = 9.8 deg/s. At the same time, the ladder unit OB elevates at a constant rate p = 5.8 deg/s, and section AB of the ladder extends from within section OA at the constant rate of 0.33 m/s. At the instant under consideration, q = 28% OA = 7.4 m, and AB = 4.7 m. Determine the magnitudes of the velocity v and acceleration a of the end B of the ladder. Answers: V = i m/s 7 = i m/$2