問題詳情
二、給定矩形（100 cm×150 cm），其中心挖空一個半徑 25 cm 的圓，試求此面積對 y 軸的慣性力矩（moment of Inertia），y 軸定在矩形的短軸方向且通過形心。已知圓對形心的慣性力矩為 
，r 為半徑。（25 分）
，r 為半徑。（25 分）
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