[问答题]
A person stands, hands at his s t-u6j pkwxk:n6 v+ty*ide, pq 8/tu: ll2kp2ib9*aov) *w dset/ ofon a platform that is rotating at a rate of 1.3rev/s If he raises his arms to a horizontal position, Fig. 8–48, the speeofi2 9td8eoa)2 /lktpbsu *v*:/w plqd 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
