A sanding disk with rotational inertia 2.2 x 10'3 kg-m2 is attached to an electric drill whose motor delivers a torque of magnitude 26 N-m about the central axis of the disk. About that axis and with torque applied for 52 ms, what is the magnitude of the (a) angular momentum and (b) angular velocity of the disk? (a) Number I Units 4. {D (b) Number I Units The gure shows a rigid structure consisting of a circular hoop of radius R and mass m, and a square made of four thin bars, each of length R and mass m. The rigid structure rotates at a constant speed about a vertical axis, with a period of rotation of 1.4 s. If R = 1.6 m and m = 1.9 kg, calculate the angular momentum about that axis. Number I Units 1}