题目:一根长1.6m的软绳两端各拴一个透明的玻璃小桶,桶中盛有带颜色的水,杂技演员用手握住软绳中央并使桶和绳子在竖直平面内转动起来,这就是“水流星”,如图1所示.要想使小桶转到最高点时水刚好不从桶中流出,此时小桶转动的线速度至少应该是多大?原解:根据圆周运动的特点可知, Title: A transparent glass kefon is attached to each end of a 1.6m long rope. The bucket contains colored water. The acrobat holds the center of the cord in the hand and rotates the bucket and rope in a vertical plane. This is the “water meteor”, as shown in Figure 1. To make the bucket go to the highest point when the water does not flow out of the bucket, how fast should the line speed of the bucket be at least? The characteristics of circular motion show that