[问答题]
A person stands, hands at his sidn+z*h s9uyrxbj:)c6 c e, on ax u2pme2 ys1-f 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 r2efu- my2 sx1potation 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
