图示直角三角形对X轴的惯性矩,则对轴的惯性矩https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/6ff449fb4a774105b5ff163aa88f14e4.png
举一反三
- Z形平面图的面积为A,形心在C点,对x,y轴的惯性矩和惯性积分别为,和。则=https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/027ca20a70794d16aa1223d9164c68df.png
- 图形对于其对称轴的( ) 形心主惯性轴 。 A: 静矩为零,惯性矩不为零 '> ) �形心主惯性轴 > � 。 B: 静矩和惯性矩均为零 C: 静矩不为零,惯性矩为零 D: 静矩和惯性矩均不为零
- 在直角曲杆上作用一矩为M 的力偶。则支座A、B 的约束力满足条件( )。<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/ed151447e7ed40a3945efa66e78f9425.png" /> A: FA=FB B: FA<FB C: 不确定 D: FA>FB
- 下列分子的空间构型为三角锥形的是: A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/6a7d6d9cfb0742739892ff3d56ae5753.png"/> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/a9d98b6b743946ceade129a2c03b0100.png"/> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/4a02cc7ea1654391ad6b02dad7c6f7d3.png"/> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/cd12bd16fed14c5f9149b60f45cf1f5a.png"/>
- 设图示截面对y轴和x轴的惯性矩分别为Iy、Ix,则二者的大小关系是https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/78eaf7d77a9243b49f003db9b3f190f5.png