如图所示,一半径
的半圆,其直径水平,且该直径与一半径
的小圆相切于O点,O点恰好是小圆的最低点和半圆的圆心,它们处在同一竖直平面内。现有一条光滑轨道AOB,它的两端分别位于上、下两圆的圆周上,轨道与竖直方向的夹角
。现让一个小球(视为质点)从该光滑轨道顶端由静止下滑至底端,取重力加速度大小
,小球在该过程中经历的时间为( )
![](https://img.xkw.com/dksih/QBM/2021/12/26/2887226631774208/2888633401368576/STEM/91d4fb5a-ce74-4525-b6ed-ba7714a32b14.png?resizew=168)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b835b04d5acc311e862b4b7b002c879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9363b11a1e7986ee1862b42ec557f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a831fae871c9028a347e59294f7422ec.png)
![](https://img.xkw.com/dksih/QBM/2021/12/26/2887226631774208/2888633401368576/STEM/91d4fb5a-ce74-4525-b6ed-ba7714a32b14.png?resizew=168)
A.0.6s | B.![]() | C.1.2s | D.![]() |
更新时间:2022-01-08 15:47:04
|
【知识点】 物体在光滑斜面滑动
相似题推荐
单选题-单题
|
较易
(0.85)
名校
【推荐1】如图所示,位于竖直平面内的固定圆环与水平地面相切于
点,A点是圆环水平直径的左端点,
、
位于圆环的同一水平线上,
、
、
是三条光滑倾斜直轨道,
、
、
三个小球分别由A点从静止开始释放,分别运动到
、
、
点,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/11/5/2844851836338176/2846743891623936/STEM/9b064877-daa1-4325-87f7-362b751fcac9.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2021/11/5/2844851836338176/2846743891623936/STEM/9b064877-daa1-4325-87f7-362b751fcac9.png?resizew=160)
A.球![]() ![]() |
B.球![]() ![]() |
C.球![]() ![]() |
D.所用的时间一样长 |
您最近一年使用:0次
单选题-单题
|
较易
(0.85)
真题
名校
【推荐2】如图,光滑斜面固定于水平面,滑块A、B叠放后一起冲上斜面,且始终保持相对静止,A上表面水平.则在斜面上运动时,B受力的示意图为 ( )
![](https://img.xkw.com/dksih/QBM/2012/6/25/1575271273938944/1575271321239552/STEM/8eabafee-ec0e-48bb-bfbe-ec5ad255ac49.png?resizew=127)
![](https://img.xkw.com/dksih/QBM/2012/6/25/1575271273938944/1575271321239552/STEM/8eabafee-ec0e-48bb-bfbe-ec5ad255ac49.png?resizew=127)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次