[问答题]
A person stands, hands at his side(ei u c/x0oh*p, on a platform nnc a(r.us (ye)f*f5lthat is rotating at a rate of 1.3rev/s If he y*r) s5a(f.fnl(unc eraises 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
