[问答题]
A person stands, hands at hi fshp sx )l5(c.ms;mw3tzlq02w voc ;i/wb x:6s sidet/gtr +bo- zq 4fce+mcec :(95z /pium, on a platform that is rotating at a rate of 1.3rev/s If he raises his arms to a horizontar t qz/t9im+ c5u/-4+ bcpfcez(mog :el 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
