[问答题]
A person stands, hands at his sid+gsy8xy31d* x zt op*we, on a platuc z a-2(0umf xsvcx+3form that is rotating at a rate of 1.3rev/s If he raises his arms to a horizontal position, Fig. 8–48, the speed of +(m3auxx0-c cuvs2zf 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
