[问答题]
A person stands, hands at his svfc/fo ov)) h(ide, on a platform that is rotatir t-sfyh3-id7aah5vz9fs1 i 8ng at a rate of 1.3rev/s If he raises his arms to a horizontal p if 9i as8 3v5sz-yhd1afr7t-hosition, 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
