[问答题]
A person stands, hands at h,b*+a9 rdyh msis side, on a platform that is rotating at a rate3cf:quzks;g0 cy(e6v of 1.3rev/s If he raises his arms to a horizontal position, Fig. 8–4cyef;u z( kv s3qc06g:8, 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
