如图所示,可看做质点的物块
质量分别为
和
,用长为
的轻绳连接沿径向放在转盘上,物块与转盘的最大静摩擦力均为各自重力的
倍,物块
到转轴的距离也为
,开始时绳恰好伸直但无弹力,转盘绕转轴
从静止开始转动,缓慢增大角速度,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de717529c9bee7648712aec86d8a0975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04e36e71560af9d693f2df67bc1f22a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
A.若剪断轻绳,![]() |
B.![]() ![]() |
C.当![]() ![]() |
D.![]() ![]() |
23-24高一下·河南洛阳·期中 查看更多[2]
更新时间:2024-04-24 10:26:44
|
【知识点】 水平转盘上的物体
相似题推荐
多选题
|
适中
(0.65)
【推荐1】如图所示,
、
、
三物体放在旋转水平圆台上,它们与圆台间的动摩擦因数均相同,
已知
的质量为2
,
和
的质量均为
,
、
离轴距离为
,
离轴距离为2
.当圆台转动时,三物均没有打滑,则:(设最大静摩擦力等于滑动摩擦力) ( )
![](https://img.xkw.com/dksih/QBM/2011/4/29/1575111484620800/1575111523278848/STEM/07774bee-f7ef-4b9e-bb3c-49f6f8c65d43.png?resizew=162)
![](https://img.xkw.com/dksih/QBM/2011/4/29/1575111484620800/1575111523278848/STEM/1344ffdeeff8466d824bacaf150103b5.png)
![](https://img.xkw.com/dksih/QBM/2011/4/29/1575111484620800/1575111523278848/STEM/d585a5c83a8a4ffa856bfd130d2a5e17.png)
![](https://img.xkw.com/dksih/QBM/2011/4/29/1575111484620800/1575111523278848/STEM/c4a118b8c79f47efaa7a0322a5d81b2d.png)
已知
![](https://img.xkw.com/dksih/QBM/2011/4/29/1575111484620800/1575111523278848/STEM/1344ffdeeff8466d824bacaf150103b5.png)
![](https://img.xkw.com/dksih/QBM/2011/4/29/1575111484620800/1575111523278848/STEM/a9727c3140be4ce1a21829f1e729142c.png)
![](https://img.xkw.com/dksih/QBM/2011/4/29/1575111484620800/1575111523278848/STEM/d585a5c83a8a4ffa856bfd130d2a5e17.png)
![](https://img.xkw.com/dksih/QBM/2011/4/29/1575111484620800/1575111523278848/STEM/c4a118b8c79f47efaa7a0322a5d81b2d.png)
![](https://img.xkw.com/dksih/QBM/2011/4/29/1575111484620800/1575111523278848/STEM/a9727c3140be4ce1a21829f1e729142c.png)
![](https://img.xkw.com/dksih/QBM/2011/4/29/1575111484620800/1575111523278848/STEM/1344ffdeeff8466d824bacaf150103b5.png)
![](https://img.xkw.com/dksih/QBM/2011/4/29/1575111484620800/1575111523278848/STEM/d585a5c83a8a4ffa856bfd130d2a5e17.png)
![](https://img.xkw.com/dksih/QBM/2011/4/29/1575111484620800/1575111523278848/STEM/186c4feb5efa4f86a5b890549ee74d56.png)
![](https://img.xkw.com/dksih/QBM/2011/4/29/1575111484620800/1575111523278848/STEM/c4a118b8c79f47efaa7a0322a5d81b2d.png)
![](https://img.xkw.com/dksih/QBM/2011/4/29/1575111484620800/1575111523278848/STEM/186c4feb5efa4f86a5b890549ee74d56.png)
![](https://img.xkw.com/dksih/QBM/2011/4/29/1575111484620800/1575111523278848/STEM/07774bee-f7ef-4b9e-bb3c-49f6f8c65d43.png?resizew=162)
A.这时![]() |
B.这时![]() ![]() |
C.若逐步增大圆台转速,![]() ![]() |
D.若逐步增大圆台转速,![]() ![]() |
您最近一年使用:0次
多选题
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适中
(0.65)
【推荐2】如图所示,水平转盘上的A、B、C三处有三块可视为质点的由同一种材料做成的正立方体物块;B、C处物块的质量相等且为m,A处物块的质量为2m;点A、B与轴O的距离相等且为r,点C到轴O的距离为2r,转盘以某一角速度匀速转动时,A、B、C处的物块都没有发生滑动现象,下列说法中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/10/5fa54ecc-5e48-4960-9815-09664f7062c2.png?resizew=135)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/10/5fa54ecc-5e48-4960-9815-09664f7062c2.png?resizew=135)
A.C处物块的向心加速度最大 |
B.A处物块受到的静摩擦力最小 |
C.当转速增大时,最先滑动起来的是C处的物块 |
D.当转速继续增大时,最后滑动起来的是A处的物块 |
您最近一年使用:0次