• 2021-04-14
    如图所示,带有不平行的两个导槽的矩形平板上作用一力偶M,今在槽内插入两个固连于地面的销钉,若不计摩擦,则 。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201805/0d43df50f3e8469ab0c27fcac80cd6a9.png