[问答题]
A person stands, hands ae(un,c d)c*h by 7wg7a: i(fbpt hi c)v:*ufy,or 1rhxm v.s side, on a platform that is rotating at a rate of 1.3rr*m.x rfc1oh)yvu :v,ev/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
