[问答题]
A person stands, hands at his side, ozpkw( a6/lt 6kn a kke)z5e81nnb 9 i mmn8platform 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 decre) 8 zn9m15 bn8mnekiekases 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
