[问答题]
A person stands, hands -iq 7.gdjw 1kxygh )f*at his side, on a platform that nr5jqii (;i lk1c/rh6 is rotating at a rate of 1.3rev/s If he raises his arms to a horizontal position, Fig. 8–48, thl5rkijri c h/ni61(q; e 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
