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試卷名稱：94年 - 學士後西醫普通物理學94普通物理學#85579
年份：94年
科目：學士後西醫物理及化學
21. The figure shows a rigid structure consisting of a circular hoop of radius R and mass m, and a square made of four thin bars, each of length R and mass m. The rigid structure rotates at a constant speed about a vertical axis, with a period of rotation of 2.5 s. Assuming R=0.5 m and m=2.0 kg, calculate the structure’s rotational inertial about the axis of rotation.
(A) 
(B) 
(C) 
(D) 
(E) 