名校
解题方法
1 . 如图所示,装置
可绕竖直轴
转动,可视为质点的小球
与两轻细线连接后分别系于
、
两点,装置静止时细线
水平,细线
与竖直方向的夹角
.已知小球的质量m=1kg,细线
长L=1m,
点距
点的水平和竖直距离相等.(重力加速度
取
,
,
)
![](https://img.xkw.com/dksih/QBM/2019/8/20/2272713816522752/2272854432694273/STEM/250dad5e-ac68-4b6b-9223-6b110fec3544.png?resizew=163)
(1)若装置以一定的角速度匀速转动时,线
水平且张力恰为0,求线
的拉力大小?
(2)若装置匀速转动的角速度
,求细线
与
的拉力分别多大?
(3)若装置匀速转动的角速度
,求细线
与
的拉力分别多大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc60cbca94d915e6739c8fca859e933.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abbe2aba242716238b79c46bb1f40e88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fda5655ef480683a2d3b74f0b523439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/276509f01529d982ab21e479a4619268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a856483658c31d8df0a249371eabcbe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0291bbe0ccccc1cd14b5a20eb70c82f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e3280953f30aa1634fb248369e3908.png)
![](https://img.xkw.com/dksih/QBM/2019/8/20/2272713816522752/2272854432694273/STEM/250dad5e-ac68-4b6b-9223-6b110fec3544.png?resizew=163)
(1)若装置以一定的角速度匀速转动时,线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)若装置匀速转动的角速度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc7ea2ff71c779f3df51a8b3e269f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)若装置匀速转动的角速度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e854383395a4938e67b53b82189bde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2019-08-20更新
|
5319次组卷
|
6卷引用:重庆市荣昌中学校2023-2024学年高一下学期3月月考物理试题