1 . 如图所示,四分之一光滑轨道
固定在竖直平面内,粗糙水平轨道
与
圆弧相切于
点。现将可视为质点的物块从与圆心等高的A点静止释放,物块滑至圆弧道轨道最低点
时的速度大小为
,对轨道的压力大小等于30N,之后物块向右滑上粗糙水平轨道
,最终静止时与
点相距
。取重力加速度
,不计空气阻力。
(1)求该物块的质量
;
(2)求该物体与粗糙水平轨道
的动摩擦因数
。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e70521af56475e285c933307e70117e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252c0e11d10541bf7dbe219b83399e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba434e8927ca89b8a27d347c477b5a9d.png)
(1)求该物块的质量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求该物体与粗糙水平轨道
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
![](https://img.xkw.com/dksih/QBM/2021/5/31/2732928993198080/2733119966552064/STEM/62e5208b-b1b9-4f07-b169-7e949ee1765c.png?resizew=219)
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2021-05-31更新
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5卷引用:黑龙江省大兴安岭呼玛县高级中学2021-2022学年高一下学期第三次月考物理试题