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P=F/S和 P=ρgh是计算压强的两个公式。它们的物理意义是什么 ?有什么区别和联系 ?什么时候使用 P=F/S,什么时候使用 P=ρgh?使用这两个公式时应注意什么 ?下面就对这些问题谈几点看法 :公式 P=F/S是压强的定义式 ,也是计算压强的普遍公式。它不仅适用于固体 ,同样适用于液体和
P=F/S and P=ρgh are two formulas for calculating pressure. What are their physical meanings? What are the differences and connections? When should we use P=F/S and when should we use P=ρgh? What should we pay attention to when using these two formulas? Here are some views on these issues: P=F/S is the definition of pressure and it is also a general formula for calculating pressure. It applies not only to solids but also to liquids and