[问答题]
A person stands, hands at his side, on a platform that iiin7 uq))uwo/k 70lh y,y y(mbs ro; ogj5j+)ih ky g0 ,m9akl*nqitating at a rate of 1.3rev/s If he raises his arms to a horizontal position, Fig. 8–48, the speed of rotation decreases t5g *o; lkqk)a+09 h,gjjymiino 0.8 $rev/s$ (a) Why? (b) By what factor has his moment of inertia changed?
Post time 2025-2-18 20:00:22
