[问答题]
A person stands, hands at his 2 x1 bvrjiq(;oc/w4 db m)-jtnsidyft mbcc9o-sm5 e;4aagl5. : 55sn nrse, on a 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 of rotation decreasfgn. rln45t:ab9 cy5-c m5ssmo 5es ;aes 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
