[问答题]
A person stands, hand;wm-oejujqijhy 27 8dy t614ns at 4d :f0w.hx vy buyg-(zhis side, on a platform that is rotating at a rate of 1.3rev/s If he raises his arms to a horizontal posdy(fgw bxyv0u :4-.hzition, 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
