[问答题]
A person stands, hands at his side, on a platformjeoxiltm+ 2i*x;0 n4;/opwp q that is rotating at a rate r;t em9i hvxs(dm12a/of 1.(h 2;vtx/e1sa9 drmmi 3rev/s If he raises 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
