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1 . 如图所示,一倾角为
的斜面和半圆竖直轨道分别与水平面平滑连接于
、
两点,
的距离为
,半圆轨道的圆心为
,半径为
,
为其最高点。一小球从斜面上
点由静止下滑,通过
点后垂直打在斜面上
点,
与
等高。不计一切阻力,则
点到地面的高度为( )
![](https://img.xkw.com/dksih/QBM/2022/4/11/2962120235786240/2963757824573440/STEM/f0074480-9496-4f1d-9d62-40bf36f0dc21.png?resizew=219)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/2022/4/11/2962120235786240/2963757824573440/STEM/f0074480-9496-4f1d-9d62-40bf36f0dc21.png?resizew=219)
A.R | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-04-22更新
|
579次组卷
|
4卷引用:贵州省2021年学业水平考试物理试题
2 . 如图所示,竖直面内半径为
的半圆形轨道与水平轨道相切于
点,直径
竖直。质量为
、可视为质点的小球在水平轨道上向右运动,经过圆弧上
点时对轨道的压力大小为
,沿圆弧轨道运动到
点后水平飞出,落在水平轨道上距离
点
的
处。不计空气阻力,重力加速度为
。小球在圆弧轨道上克服摩擦力做的功为( )
![](https://img.xkw.com/dksih/QBM/2021/6/23/2749414214279168/2751210812325888/STEM/7d3f9324-922c-4838-b090-15d8d1050e0d.png?resizew=271)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f00758c7f5cb349d03558ca08b065d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e7f30167e1135806fe9de641870b1e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/276509f01529d982ab21e479a4619268.png)
![](https://img.xkw.com/dksih/QBM/2021/6/23/2749414214279168/2751210812325888/STEM/7d3f9324-922c-4838-b090-15d8d1050e0d.png?resizew=271)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次