[问答题]
A person stands, hands at his side, on a platfo 4.qpcsf658n ) esywrls(/elkrm that is rotating at a rat 1wr )e4yeko wq8xl)soy*v)j 5emx/ y4e of 1.3rev/sjykq5 mx rwy18 eoels)o /*)44vwxye ) If he raises his arms to a horizontal position, Fig. 8–48, the 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
