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一、浮力产生的原因例1 如图1,圆柱形容器,底部和侧壁分别有一个木塞A和B,A和B排开水的体积相等,则() (A)A塞受到的浮力大于B塞受到的浮力 (B)A、B两塞受到的浮力相等 (C)A、B两塞都不受浮力 (D)只有A塞受到的浮力为零错解:A和B都浸在同种液体里,又有V排A =V排B,根据F浮=ρ液·g·V排推出F浮A=F浮B, 选择(B)。正解:浸在液体里的物体受到液体对它向
First, the cause of buoyancy Example 1 As shown in Figure 1, a cylindrical container, the bottom and side walls have a wooden stopper A and B, A and B are equal in the volume of open water, then () (A) A plug received buoyancy greater than The buoyancy of the B plug (B) The buoyancy of the A and B plugs is equal to (C) Both the A and B plugs are not subject to buoyancy (D) Only the buoyancy of the A plug is zero Mistake solution: Both A and B are immersed in the same In the liquid, there are also V rows A = V rows B, according to F float = ρ liquid · g · V row introduced F float A = F float B, select (B). Positive solution: An object immersed in liquid is subject to liquid