如图所示，一个内壁光滑的圆锥的轴线垂直于水平面，圆锥固定不动，两个质量相同的小球A、B，紧贴着内壁分

如图所示，一个内壁光滑的圆锥的轴线垂直于水平面，圆锥固定不动，两个质量相同的小球A、B，紧贴着内壁分

A、对小球受力分析，小球受到重力和支持力，它们的合力提供向心力，如图 如图所示，一个内壁光滑的圆锥的轴线垂直于水平面，圆锥固定不动，两个质量相同的小球A、B，紧贴着内壁分别在图中所示的水平面内做匀速圆周运动，则（　　） A. 球A的线速度必小于球B的线速度B. 球A的角速度必小于球B的角速度C. 球A的运动周期必小于球B的运动周期D. 球A对筒壁的压力必等于球B对筒壁的压力(图2)根据牛顿第二定律，有：F=mgtanθ=mv======以下答案可供参考======供参考答案1:In Kind stadium, Yao Ming's jersey was hung high on the top ceiling of gymnasium. Since then, the 15th shirt not only will be permanently sealed, but also will be considered as a flag. In the United States, either NBA or NHL, the shirt played for the team retires and will be hung above the stadium that must be regarded as a supreme honor by all players. Larry bird, magic Johnson and the flying man Michael Jordan had all enjoyed this award. But in China,Black Christian Louboutin, previously every player haven't enjoyed such recognition,Christian Louboutin Bridal Shoes, but the young Yao Ming have now, not only because of his excellent game skill, but also because he represent a force,louboutin womens shoes, a symbol of a kind of the so-called Chinese spirit.Nowadays, trans-atlantic Yao has gained recognition of fans all round the world, some people even put him and joba chamberlain on the equivalent status,and predicted that he would rule in the entire NBA. Facing such as the tide of the praise and agreement, the young Yao said simply : I have a lot to learn. Nowadays while most young players are good at the arrogance and playing big increasing prevalence, Yao really showed a kin

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