[问答题]
A person stands, hands fu.ks+ 6qg/n kal62o t+jc56m wom dlr5t his side, on a platform that is rotating at a rate of 1ltjo56 6+l2cmd o5 wrm.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
