[问答题]
A person stands, hands at his side, on a 0ld:m3 kst ttmh nwiz 3d,g-;4platf ,6smyp4ky a ol9hf)fa ;okd /(61mxwlorm that is rotating at a rate of 1.3rev/s If he raises his arms to a horizontal position, Fig. 8–48, the speed of rotation d oa6xyk/a (lml)h6 sdokf;y1f, wp m49ecreases 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
