[问答题]
A person stands, hands at his side, on a platform xq d7zjp7hi+ (ix5(/8wnptw)no8vrcz 4:x fe that ige/x)tf:v bb 1s rotating at a rate of 1.3rev/s If he raises hisfxgb: e/) v1tb 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
