問題詳情
15.一個圓形面積的半徑是 R，極座標慣性矩 J o為 
，對 y 軸的慣性矩 Iy 為 Jo /2，對 y 軸的旋轉半徑(radius of gyration)k y 為何？
(A)2R
(B) R/2
(C) R2/4
(D) R/4
參考答案
無參考答案
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