[问答题]
A person stands, hands at his side,xf2( ;q0)2osxy ua orzg -:v go.azaq+ on a platform that ir4q4)k l(ycummdmrzb5 /,dq7 s rotating at a rate of 1.3rev/s If he raises his arms to a horizontal posi7,5qmk)mu4 /(y zcd4 r dbqrlmtion, 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
