在正立方体的前侧面沿AB方向作用一力，则该力______。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/ba42e7c635dd4e388e6770748a751735.png
举一反三
- 在正立方体的前侧面沿 AB 方向作用一力 ，则该力 __ ____ 。http:...8e6770748a751735.png
- 已知一正方体，各边长a，沿对角线BH作用一个力，则该力在z1轴上的投影为___________。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/5e81faaf5b7f42e790a3822d7f884c75.png
- 已知一正方体，各边长a，沿对角线BH作用一个力F，则该力在x1轴上的投影为____________。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/b0e0cae96b734bf3a3dfbc78eee28790.png
- 已知一正方体，各边长a，沿对角线BH作用一个力，则该力对OG轴的矩的大小为________。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/dd21a44e52c949cda14aa9c9c0fa29a8.png
- 图示单元体应力状态，沿x方向的线应变εx可表示为（ ）。 <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/9fdd7efe625f4047bb61ef38f5aea871.png" /> A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/5da2d36f7ef84cbc8396b1e27b775bf4.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/164a3d85fdb6462696d83d62b92b2435.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/9e37e58e1c12442e8e018c0af637dfdf.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/41fd81417e5f47bea1db35fed7c2c44e.png" />