单项选择题
如图示，长度为L的直杆可绕悬挂点O在竖直面内自由摆动，直杆质量为m，转动惯量为
。将质量为m/2的一团橡皮泥沿水平方向对准竖直悬挂的直杆下端点处掷出, 测得橡皮泥以水平速度v打在直杆下端点处并附在直杆上一起运动，则碰撞后瞬间直杆下端点的速率为0.6v。
A、正确
B、错误
点击查看答案
相关考题
-
单项选择题
Word中，设置标题样式的命令按钮在（ ）选项卡中。 A. 插入 B. 开始 C. 页面布局 D. 引用 -
未知题型
The batik technique was lost in ChinC.NG
A.A.Y
B.N -
未知题型
Societies change over time while their reputations【B1】behinD.Many things which are often regarded as【B2】British derive from books, songs or plays which were written a long time ago and which are no longer【B3】of modem lifE.One example of this is the popular belief【B4】Britain is a 'land of tradition'. This is what most tourist brochures【B5】. It is based on【B6】can be seen in public life and on centuries of political continuity. And at this level, it is【B7】truE.The【B8】ceremony of the state opening of Parliament, for instance, carefully【B9】customs which are centuries olD.【B10】does the military ceremony of 'trooping the colour '.【B11】, the changing of the guard outside Buckingham Palace never changes.【B12】, in their private everyday lives, the British as individuals are probably less【B13】to follow tradition than【B14】the people of most other countries. There are very few ancient traditions that are followed by the majority of families on special【B15】. The country has fewer local【B16】with genuine folk roots than most other countries havE.The English language has fewer sayings that are【B17】common everyday use than many other languages do. The British are too individualistic for these things.【B18】, it should be【B19】that they are the most enthusiastic video-watching people in the world—the very opposite of a traditional【B20】!【B1】A.leaveB.lagC.followD.lack
A.【B10】does
B.【B11】,
C.
【B12】,
D.【B18】,
E.leave
B.lag
C.follow
