[问答题]
A person stands, hands at his side, on a platforb ndt5)st;0gp*m0ddlt + phn1m 5ma dltrq5y uh14, jpmg45c 1xthat is rotating at a rate of 1.3rev/s If he raises his arms to a horizontal position, Fig. 8–48, the speed of rotation decreases ,cpg551ma5 1 4qty xl4jdrmh uto 0.8 $rev/s$ (a) Why? (b) By what factor has his moment of inertia changed?
Post time 2025-2-18 20:00:22
