• 2021-04-14
    图示正方形对x,y轴的惯性矩阵和惯性积分别为Ix,Iy和Ixy,下列结论中哪些是正确的?( ) (1)Ix=Iy; (2)Ix’=Iy’; (3)Ix=Ix’; (4)Ixy=Ix’y’http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/06df735ae8734b3f995cf9274f091650.png