[问答题]
A person stands, hands -v; : ftegb)+rfoxdw 8ah.c1 tat his side, o-c0tv(of 7.fy3mpnk dn a platform that is rotating at a rate of 1.3rev/s If he raises his arms t (ny7pf o -tmd0vfc3k.o a horizontal 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
