[问答题]
A person stands, hands at him tk5/if2bq:-1fhg6 78j) + msyabu zbdz3byjs side, onhr :7k,:y23;;h)xb:3poa uukzj,kfr ogdo n n a platform that is rotating at a rate of 1.3rev/s If he rais:,xka;b; hkyh3 z :onur 7,p3r:junkgo2 fo) des 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
