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在求解固体压强、液体压强以及气体压强等问题时,由于部分同学对压强公式及规律的理解缺乏正确的认识,解题时不作过深的思考,频频导致错解的产生.易错点一:固体压强的计算1.在运用压强公式p=F/S计算时,要明确受力面积应该是指物体相互挤压的那部分面积.部分同学容易错误地理解为是物体的面积,或对受力面积考虑不周全,导致多计、少算的现象.2.关于压强公式中压力的确定,部分同学会错误地认为压力大小就等于物体所受的重力.其实只有
When solving problems such as solid pressure, liquid pressure and gas pressure, some students do not have a correct understanding of the pressure formula and law, Calculation of solid pressure 1. In the use of pressure formula p = F / S calculation, it is clear that the area under stress should refer to that part of the mutual squeeze of the area. Some students easily mistakenly understood as the area of the object, The area of force is not considered thoroughly, leading to the phenomenon of multi-plan and less-counted.2.For the determination of the pressure in the pressure formula, some students mistakenly think that the pressure is equal to the gravity of the object,