[问答题]
A person stands, hand, ,(.ev4rs ruy0 zwc23rgshqw hmn8emv p5jzddh4+) )s at his side, on a platform that is rotating at a rate of 1.3rev/s If he rpnd8h 4+d)e )jvm5zhmaises 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
