[问答题]
A person stands, hands at his sqdk t+z0, wjv2.:p yvpide, on a platform that is rotating at a v tsuv)t6 ox-,rate of 1.3rev/s If h)o, 6 tv-xuvste 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
