[问答题]
A person stands, hands at his s.tuet(3q gg. oao q-iwsd2:zrft)x- *ide, on a platform that is rotating at a rate uvv 0pi3 )s99ifuzf mp*lt(6pof 1.3rev/s Ii*utsz3 p f) 9f0lpvu6vm p(9if 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
