[问答题]
A person stands, hands at his side, on a platform that is rorzyvw le; (q()q.q3fjtat(q g 1bm2d8smytg p:g/ing at a rate of 1.3rev/s If he raises his arms to a horizontal position, Fig. 8–48, the speed ofyg:p2/1 ms gbqmt8( dg 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
