[问答题]
A person stands, hands at his sijh+ k;/s mta8ude, ogngwamps*y93q5-p /zn a 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 rotation decreases to s g*g wymz3a9q-pn p/50.8 $rev/s$ (a) Why? (b) By what factor has his moment of inertia changed?
Post time 2025-2-18 20:00:22
