有一类比较特殊的问题 ,它有多种不同的求解方法 ,且不同的解法所得结果的形式不同 .解答此类问题(尤其是以选择题形式出现 )时 ,要特别当心 ,以免造成图 1漏解或误判 .本文就以下几例 ,谈谈对此类问题的解法 .例 1 .如图 1所示 ,均匀杆ＡＢ重为Ｇ ,杆可绕其端点Ａ转动 ,在杆的 There is a relatively special problem, which has many different methods of solving, and the results obtained by different solutions have different forms. When answering such questions (especially in the form of multiple-choice questions), be especially careful so as not to cause leakage in Figure 1. Solution or misjudgment. This article discusses the solution to this type of problem for the following examples. Example 1. As shown in Figure 1, the uniform rod AB is G, and the rod can be rotated around its endpoint A, in the rod’s