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本刊2003年第4期的《动量最值法巧解分离点》一文(以下简称原文),其中的例3,笔者认为给出的解答是错误的.而且同样的或类似的错误,其它资料上也多次见到.今列出如下二题: 原题1:如图1所示,竖直平面内一半径为R的圆弧轨道,其高为h,一物体以某一速率v_0,从圆弧底端冲上弧面,若不考虑摩擦,要使物体通过圆弧顶端而又不脱离弧面,则其速率v_0应满足什么条件?(提供的答案是
The article “The Separation Point of the Momentum Maximum Value Method” in this issue of the 4th issue of the magazine (hereafter abbreviated as the original), in which Case 3, the author believes that the given answer is wrong. And the same or similar error, other information Also seen on many occasions. Today is listed as the following two questions: The original question 1: As shown in Figure 1, a circular arc with a radius of R in the vertical plane, its height is h, an object at a certain rate v_0, If you do not consider the friction from the bottom of the circular arc, if you want the object to pass through the top of the arc without breaking away from the arc, what is the rate v_0 should satisfy? (The answer provided is