22. (Rolling, Torque, and Angular Momentum) i What is the angular momentum of a figure skater spinning at 3.0 rev/s with arms in close to her body, assuming her to be a uniform cylinder with a height of 1.5 m, a radius of 15 cm, and a mass of 48 kg? ii How much torque is required to slow her to a stop in 4.0 s, assum- ing she does not move her arms? Answer: i) L 10 kgm2/s ii) T = -2.5 mN