To decrease the angle of elevation of the stationary 200-kg ladder, the gears that raised...

To decrease the angle of elevation of the stationary 200-kg ladder, the gears that raised it are disengaged, and a fraction of a second later a second set of gears that lower it are engaged. At the instant the gears that raised the ladder are disengaged, what is the ladder’s angular acceleration and what are the components of force exerted on the ladder by its support at O? The moment of inertia of the ladder about O is I0 = 14,000 kg-m2, and the coordinates of its center of mass at the instant the gears are disengaged are