[问答题]
A person stands, hands at his side, on a platform tha5bd1s fhtsjuy:9 4m 1gp amxw94r,bd7 t isenkw jej u,k,0v*gf-8y ra*22c 5lvwx rotating at a rate of 1.3rev/s If he raises his arms to a horizontal position, Fig. 8–48, t,a lv*nx0j5 -,2ww8ge y*cfvr2ue kjkhe 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
