[问答题]
A person stands, han a( 2nklacrp bf48p,(mds;m f3 zmx8w-/euu faa6 at his side, on a platform that is rotating at a rate of 1.3rev/s If he raises his armseufm; fxwa/ 83u-6amz 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
