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1.探究现象例1 用一段细线将粗细均匀的直铁丝吊起后,直铁丝在水平位置处于平衡状态;若将右端折叠一段, ①可能出现的现象是(); ②你猜想此现象的依据是()(山西) 分析本题妙在于先猜想将要发生的物理现象,再用物理原理去分析证明.这种从现象产生原理,再由原理验证现象的方式,是探究性试题的一大特点.答案为①左端下降,右端上升(或逆时针转动);②杠杆平衡条件(或杠杆原理).
1. Exploring the phenomenon Example 1 After lifting a straight wire of uniform thickness with a thin line, the straight wire is in a balanced position in the horizontal position. If the right end is folded for a period of time, 1 the phenomenon that may occur is (); 2 you guess this phenomenon The basis is () (Shanxi) The beauty of the analysis is to first guess the physical phenomena that will occur, and then use physical principles to analyze and prove. This method of generating phenomena from phenomena, and then verifying the phenomena by principles, is a major feature of inquiry questions. The answer is 1 left-down, right-side up (or counter-clockwise rotation); 2 lever balance conditions (or leverage principle).