[填空题]
(a) What is the angular momentum of a fit1w)t7 sqa9(sk;ip,d3 mp kfagure skater + zkj/,h g3bk gtu9he*spinning at 3.5 $rev/s$ 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 55 kg? $kg \cdot m^2$ (b) How much torque is required to slow her to a stop in 5.0 s, assuming she does not move her arms? $m \cdot N$
Post time 2025-2-18 20:00:22
