[问答题]
A person stands, hands at hipp7am6u s o89bdf 8tx(uq-* lcs side, on a pla6.p ,agtibz8v+:jbq r tform that is rotating at a rate of 1.3rev/s If he raises his arms to a irj,+ gpb v :qbtaz6.8horizontal 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
