(东营专版)2019年中考物理总复习第九章压强真题演练.doc

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1、1压强考点一 固体压强1.(2015东营中考)如图所示,实心 均匀正方体放在水平桌面上,从虚线处将其沿竖直方向截成大小不同的甲、乙两块,则两块对水平桌面的压强 p 甲 、 p 乙 的大小关系是( )A p 甲 大于 p 乙 B p 甲 等于 p 乙C p 甲 小于 p 乙 D无法判断考点二 液体压 强2(2017 东营中考)如图所示,完全相同的甲、乙两个烧杯内装有密度不同的液体。在两烧杯中,距离杯底同一高度处有 A、 B 两点,已知 A、 B 两点压强相等,则烧杯甲、乙对桌面的压强 p 甲 、 p 乙 大小关系为( )A p 甲 p 乙C p 甲 p 乙 D条件不足,无法判断考点三 流体压强与

2、流速的关系3(2016东营中考)当火车驶过时,人站在安全线以内,即使与火车保持一定的距离,也非常危 险。以下现象 不能用解释此现象的规律解释的是( )A风沿着窗外的墙面吹过时,窗口悬挂的窗帘会飘向窗外B用吸管把饮料吸进嘴里C大风会把不 牢 固的屋顶掀翻D护航编队各船只多采用前后行驶而非并排行驶4(2018东营中考)如图所示,某型 号飞机模 型机翼上 表面凸起,下表面较平。在飞行过程中由于上表面的空气流速_(选填“大”或“小”),压强_(选填“大”或“小”),从而能获得向上的升力。25(2 017东营中考)校园里时常出现小“旋风”,当“旋风”经过时,旋涡中心气流的速度_ _,旋涡内部气体压强_,容易把地面上的纸屑“吸”向空中(均选填“大”或“小”)。参考答案1B 2.A 3.B4大 小 5大 小

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