[问答题]
A person stands, hands at his 7b8axwzws4k32.p4u s i kf5r jeyv- 3vside, on a platform that is rotating at 4vh0s*uq wxbgu 78gp6 a rate of 1.3rev/s If he raises his arms to a horizontal position, Fig. 8–48, the speed of r* vwbu06 h7ggq84 xpusotation 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
