[问答题]
A person stands, hands at hi*sdsaeq-q,y +qzzh-f ks)w0 0 s side, on a platform that is rotating at a dq:ry4f.b(ff h *vxrt7c- q, rrate of 1.3rev/s If he raises his arms to a horizontal p-bf v ct*rf:y.4,7q df(rhqxrosition, 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
