[问答题]
A person stands, handsq,x2t9/unu/7 e wpv ofq8tj) f at hq ,6tn1wxryp+2)a4c p y- if33lryhin is side, on a platform that is rotating at a rate of 1.3rev/syia t- 6rf 3,iq4y2x+p 3cphynw1rln) If he raises 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
