8. [-/2 Points] DETAILS MY NOTES OSUNIPHYS1 11.P.090. A boy stands at the center of a platform that is rotating without friction at 1.6 rev/s. The boy holds weights as far from his body as possible. At this position the total moment of inertia of the boy, platform, and weights is 7.2 kg . m". The boy draws the weights in close to his body, thereby decreasing the total moment of inertia to 1.4 kg - m. What is the final angular velocity of the platform? (Enter the magnitude in rev/s.) rev/s (b) By how much does the rotational kinetic energy increase (in ])? Additional Materials 20 Reading Submit Answer 9. [-/2 Points] DETAILS MY NOTES OSUNIPHYS1 11.P.092. A thin meter stick of mass 120 g rotates around an axis perpendicular to the stick's long axis at an angular velocity of 220 rev/min. (a) What is the angular momentum of the stick if the rotation axis passes through the center of the stick? (Enter the magnitude in kg - m /s.) kg - m /s (b) What is the angular momentum of the stick if the rotation axis passes through one end of the stick? (Enter the magnitude in kg - m /s.) kg - m /s Additional Materials 20 Reading Submit