[问答题]
A person stands, hands at his side, on a platform that ir scy:zq:u,8ugkkx + s8 d1h:qsp;jf2)l +a nnz,ogg3y):cygx rotating at a rate of 1.3rev/cjn + p2)yan,goxlf;z3g) :ygs If he raises his arms to 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
