[问答题]
A person stands, handps .oc1 x jwej*h0x1-0(rf(e co5lseoor9h8 vttr8 r5 3bdfqwe::yx 5s at his side, on a platform 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 dec e:8r8ovdw39t:rrh qf tx5 y5breases 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
