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初中物理浮力的计算是个难点，常用方法大致有四种，根据具体问题采用不同的方法．（一）压力差法根据浮力产生的原因，计算浸在液体中的物体上、下两个表面所受的压力差即为物体在液体中所受的浮力．方向竖直向上例1正方体的边长为10厘米，上表面离水面5厘米（如图1所示），这
The calculation of physical buoyancy in junior high school is a difficult point. There are roughly four common methods. Different methods are used according to specific problems. (1) Pressure difference method According to the cause of buoyancy, the pressure difference between the upper and lower surfaces of an object immersed in liquid is calculated as the buoyancy of the object in the liquid. The vertical side of the example 1 cube is 10 centimeters long and the upper surface is 5 centimeters from the water surface (as shown in Figure 1).