运用压强公式 p=F/S和液体内部压强公式 p=ρgh进行计算是初中物理的重点与难点问题 .涉及的题目情境复杂 ,解法多样 .有的用 p=F/S,有的用 p=ρgh,还有的两式兼可 .学生由于不识庐山真面目 ,常把两公式张冠李戴 ,造成错解 .由于不能融会贯通 ,灵活运用 ,造成繁解 .有无突破这 Using the pressure formula p=F/S and the liquid internal pressure formula p=ρgh to calculate is the key and difficult problem in junior high school physics. The topics involved are complex and the solution is various. Some use p=F/S, and some use p= Ρgh, there are also two types of ambiguity. Because students do not know the true colors of their faces, they often mistake the two formulas and create misunderstandings. Because they cannot be integrated, they can be flexibly used, resulting in complications. Is there a breakthrough?