[问答题]
A person stands, hands at his sidv eyq 9re*idspk0 2);pe, on a platforra.7hg e0fltujia8 qq 5*p (,tm that is rotating at a rate of 1.3rev/s If he raises his arms to a horizontal position, Feqr7l*f. ( h0qt58ta,i jagup ig. 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
