[问答题]
A person stands, hands at dx+jlei0rk3 lqb mh31b7a+ 1w his sid0feog *65h+ztpk4vu0q ,o+.q gokj ree, on a platform that is rotating at a rate of 1.3rev/s If he raises his arms to a horiz+,ok6t+e0 5g fhqj or*oeukq0pgvz. 4 ontal 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
