[问答题]
A person stands, hands a;b5o e(w 3h-+f-j0 pjaaja yfd5k .mmij.zb9f5 kq m d(gpb(p(t his side, on a platform that is rotating at a rate of 1.3rev/s If he raises his arms to a horizontal position, Fig. 8–4pb5bmj z.pkd9((g q(f8, 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
