关于匀速圆周运动的物体的线速度、角速度、周期的关系，下面说法中正确的是（ ）
A．角速度大的周期一定小
B．线速度大的角速度一定大
C．线速度大的周期一定小
D．角速度大的半径一定小
答案：A
题目分析：由角速度公式
可知角速度大的周期一定小，选项A正确；线速度与角速度和半径都有关系，选项B错误；由周期公式
可知线速度大的周期不一定小，选项C错误；同理选项D错误；故选A
点评：本题难度较小，熟悉并理解圆周运动中各物理量的关系
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| The 1 in Britain is very different from our Chinese food. For example, they eat a lot of potatoes. They like to eat 2 every day. They eat bread 3 breakfast and usually for one other meal. They eat their bread with butter, 4 cheese or jam (果酱). Cheese and butter are made from 5 . They drink a lot of milk, too. They drink the milk cold or 6 , and they put it in their tea. They put sugar in their 7 , too. They are the world's biggest tea 8 . They don't eat much rice. And they like meat or fish with 9 and other vegetables. They serve all these together. After the main meal they always have 10 sweet. They call this dessert. They don't have dumplings in Beijing. | |||
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