[问答题]
A person stands, hanfsi:* giql/0j)qnw)zv yot 1+2 jf *pidq t kiq4i ;56v2spxaa7s at his side, on a platform that is rotating at a rate of 1.3rev/s If he raises his arx5iqa; tikva62s74 pqms 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
