• 2021-04-14
    均质细杆OA长L,质量为m,自铅直位置经微小扰动后绕O轴倒下,至水平位置时与一尖角B相碰,为使轴O处不产生碰撞冲量,OB的距离h应为_____。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/2f24848d7f3a47be8fd45b64356266f1.png