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有关浮力的问题变化多端,如果仅停留在有限的知识中,不善于拓展整理,无法适应题目的变化,结果将会迷失在题海中.本文归纳几种求浮力的方法,以期对同学们有所帮助.一、压力差法如图1所示,一个立方体浸没在水中,它的6个表面都受到水的压力,左右、前后两侧受到的压力大小相等、方向相反,即受力互相平衡;只有上下两个表面由于深度不同,水的压强不同,受到水的压力也就不相等.下表面
The buoyancy problems are so varied that if you stay in the limited knowledge and are not good at developing and adjusting to the problems, the result will be lost in the sea of questions. First, the pressure difference method As shown in Figure 1, a cube immersed in water, its six surfaces are subject to water pressure, left and right, both sides of the pressure by the same size, the opposite direction, that is, the force balance with each other; Only the upper and lower surfaces of two different depths, the pressure of water is different from the pressure of the water is not equal to the lower surface