• 2021-04-14
    杆OA长L,以w0绕O轴转动,长R的叶片AB以相对角速度wr绕OA直杆的A端转动,若以OA杆为动坐标系,则当AB22a5AO时,B点的牵连速度的大小为_____________。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/69c1d5641e1a45149de8da65d0c79e34.png