[问答题]
A person stands, hands4.a5uofk bv f4 ,lo;u6rqc :cr at his side, on , co*)6yd:qih 1q+ l ,ei/eqc1uuebkea platform that is rotating at a rate of 1.3rev/s If he raises his arms to a horizontal position, Fig. 8–48, the speed ofu eb:ilcy6qq/c ,hie ee 1dqo) 1+ku*, 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
