Points B and C lie in the .x-y plane. The y axis is vertical. The center of mass of the 18...

Points B and C lie in the .x-y plane. The y axis is vertical. The center of mass of the 18-kg arm BC is at the midpoint of the line from B to C, and the moment of inertia of the arm about the axis through the center of mass that is parallel to the z. axis is 1.5 kg-m2. At the instant shown, the angular velocity and angular acceleration vectors of arm AB are ωAB = 0.6k (rad/s) and αAB = 0.3k (rad/s2). The angular velocity and angular acceleration vectors of arm BC are ωBC = 0.4k (rad/s) and αBC = 2k (rad/s2). Determine the force and couple exerted on arm BC at B.