The upper body of the crash dummy has a mass of 75 lb, a center of gravity at G, and a rad...

The upper body of the crash dummy has a mass of 75 lb, a center of gravity at G, and a radius of gyration about G of kG = 0.7 ft. By means of the seat belt this body segment is assumed to be pin-connected to the seat of the car at A. If a crash causes the car to decelerate at 50 ft/s2, determine the angular velocity of the body when it has rotated to θ = 30°.