[问答题]
A person stands, hands a4 q/ idp(y vco+ai/o+8 ulqrrbv ii43*t his s lrqsvt;x)mkgw/2uo+j 6/y p6ide, on a platform that is rotating at a rate of 1.3revsxvmgp)u /qr26lk y6;t+/woj/s 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
