A solid disk rotates in the horizontal plane atan angular velocity of 0.067 rad/s with respect to an axis perpendicular to the disk at tis center. The moment of inertia ofthe disk is 0.10 kg·m2. From above, sand is dropped straightdown onto this rotating disk, so that a thin uniform ring of sandis formed at a distance of 0.40m from the axis. The sand in thering has a mass of 0.50kg. After all the sand is in place, what is the angular velocity of the disk?