[问答题]
A person stands, hands at 91li: y2ew r*jf9yklv t/sp0s his side, on a platform that is rbr) 6e4xxeci9i 1xjk7 otating at a rate of 1.3rev/s If he raises his arms to a horiz 76xe1)4bcjr9iiex kxontal position, Fig. 8–48, the speed of rotation decreases to 0.8 $rev/s$ (a) Why? (b) By what factor has his moment of inertia changed?
Post time 2025-2-18 20:00:22
