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1中考考点分析重点是考查压强知识应用:分析现象和有关的计算。在应用P=F/S公式计算物体受到压强时,①应注意F指压力,不要把压力和重力混淆。②当多个力作用在同一物体上时P为合力。③还应注意S表示受力面积,而不是物体的表面积。④要注意柱状体、重叠体的压强计算。液体压强公式P=ρgh中h指的是深度,即
1 The focus of the test in the test is to examine the application of pressure knowledge: analysis of phenomena and related calculations. In the application of P = F / S formula to calculate the pressure on the object, 1 should pay attention to F pressure, do not confuse the pressure and gravity. 2 P is the resultant force when multiple forces act on the same object. 3 It should also be noted that S denotes the force area, not the surface area of the object. 4 It is necessary to pay attention to the pressure calculation of the columnar body and the overlapped body. In the liquid pressure formula P=ρgh, h refers to the depth, ie