如图所示,有两组同样的砖放在水平桌面上,
组一块,B组两块,每块砖长·宽·高之比为
,则此时
、B 两组砖对地面压力之比为______ ,压强之比为______ ;若将
组侧放,要使B组与
组对桌面压强相等,B组的放法可以是并排______ (选填“平放”“侧放”或“立放”)。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b03b3fdbd570b5aad087602a3b0edd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/2022/4/14/2957976042930176/2958764661628928/STEM/23604e7b-b098-4c18-acd8-b82047ef3283.png?resizew=216)
更新时间:2022-04-15 16:45:01
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【知识点】 压强公式的简单应用
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【推荐1】如图所示,小明将一个小箱子慢慢匀速向右推动,这个过程中,箱子对桌面的压强______ ,小明对木箱的推力______ (均选填“变大”、“变小”或“不变”)。
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/2b8f99bd-8ea7-4664-bc5a-6ee377623737.png?resizew=322)
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【推荐2】如右图所示,
、
两长方体叠放在一起,放在水平桌面上,
的密度为
,底面积为
;
的密度为
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,若
对
的压强与
对桌面的压强恰好相等,则它们的厚度之比![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f3d48bf47fa2adefdbc43f9ed586c96.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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