[问答题]
A person stands, hanl*nk,-dqvaz(( v v.llhs5f; wds at h)htbo/ w: w:ci6 *mzs9ybv.oxis side, on a platform that is rotating at a rate of 1.3rev/s If he raises his arms to a horizontal position, Fig. 8–4v.by wowoti:)xm:sb96 */hzc 8, 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
