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把从所求量追溯到已知量的方法称为分析法。即确认要求的物理量,并根据物理公式分析明确要求出这个量需要知道哪些量,这些量是已知的还是未知的,如果是未知的,再运用上述方法进行分析,直到需要的量都是已知量时为止。将分析过程倒过来即可逐步求出各未知量并最终求出要求的物理量。用分析法来探求解题思路是初中物理解题中用得较多的一种方法。例1 在空气中用弹簧测力计称某石块所受重力为5N;浸没在水中称量,弹簧测力计的
The method of tracing from the quantity sought to a known quantity is called analysis. That is to confirm the required physical quantity, and according to the physical formula analysis to explicitly ask what amount of this quantity need to know, these quantities are known or unknown, if unknown, then use the above method to analyze until the required quantity is already When you know the amount. Reverse the analysis process to gradually find the unknowns and finally find the required physical quantities. The use of analytical methods to explore problem solving is a method that is used more often in junior high school object understanding problems. Example 1 Using a spring dynamometer in the air to weigh a stone with 5N of gravity; immersed in water to weigh, spring dynamometer