[问答题]
A person stands, hands at his side, on a platform that icq47qnv uem 5 yx/,:a)wn ica,s rotating at a ra e*) o ax1cxj0r:cvrj,te of 1.3rev/s If he raises0v ox)* ecja1jr,r: cx 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
