如图所示,一足够长的水平轨道与半径为
的竖直光滑
圆弧形轨道
底端相切,质量为
的木块在一大小为
、方向与水平成
角斜向上的拉力作用下,从轨道上的A点由静止开始运动,当木块到达
点即将进入圆轨道时,撤去拉力
。已知木块与水平轨道的动摩擦因数
,
间的水平距离为
,
,
,
,求:
(1)木块到达
点时的速度
大小及木块从
运动到
的时间
;
(2)木块在
点时对轨道的压力
大小;
(3)木块从离开
点到再次回到
点的时间
。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dad34b8381fe1344cf7faae49e51ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6967ec3aaf9e7e6a9d90533b8ff61d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532c4c5ce255a9f05d2793166d4f8e96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/912b6b14c72a43003dd0919636f8c272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f881cb9071ca8fea7cef4ab8d4865589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0770962e2bc1a17aea64bc0b8b247f0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f986badfc5dea707c164e2ab6c98dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8485466d2127bd681a322f87c58f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799edf593e3ba2b2372a83d9782be3a2.png)
(1)木块到达
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3702da8f39e362c7fc0acdddb8de103.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/87c7eb49a823f757461cd5260757b088.png)
(2)木块在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b38db0e3c12fd15ea2da1cd7ac11fe5.png)
(3)木块从离开
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd84a8f95166367063218ee03ffd5a7.png)
![](https://img.xkw.com/dksih/QBM/2021/9/12/2813778804137984/2815267742179328/STEM/e2bf484e-3b1f-4e80-a1ca-eb3c87816e6c.png?resizew=356)
19-20高三上·上海奉贤·期中 查看更多[6]
2020届上海市奉贤区奉城中学高三上学期期中物理试题2022届上海师范大学附属中学高三上学期开学考试物理试题2023届河南省周口市太康县第一中学高三上学期模拟考试训练物理试题(已下线)题型专练02 涉及能量问题的直线运动或曲线运动综合-2023年高考物理【热点·重点·难点】专练(上海专用)山东省潍坊市临朐县第一中学2022-2023学年高三上学期9月月考物理试题第三章 圆周运动 单元测试1-鲁科版(2019)必修第二册
更新时间:2021-09-24 22:59:47
|
【知识点】 机械能与曲线运动结合问题
相似题推荐
解答题
|
较难
(0.4)
【推荐1】如图所示,将原长为
的轻质弹簧放置在倾角为
的轨道
上,弹簧的一端固定在
点,另一端与质量为
的滑块接触但不连接(滑块可视为质点)。
长为
端与半径为
的光滑圆轨道
相切,
点在圆心
的正上方,
点与
点等高。滑块与
间的动摩擦因数
。用外力推动滑块至
点,使得
,然后放开,滑块由静止开始沿轨道
运动,之后刚好能到达圆轨道的最高点
。已知重力加速度大小为
。
(1)求滑块初始位于
点时,弹簧的弹性势能
;
(2)若更换另一个质量为
的滑块,仍将滑块从
点由静止释放,滑块能滑上圆轨道且能沿着圆轨道滑下,求
的可能值范围;
(3)若滑块的质量
,圆轨道的半径
滑块恰能运动到
点后又沿着圆轨道下滑,求从
到
的过程中,重力功率的最大值。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8141d00b74eb4c50bf861e6ff0edf137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b111360697241dd787c164bdbb9fbe4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f881cb9071ca8fea7cef4ab8d4865589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3667ed209c2217158097715172eb15aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df2fb29ea46acb9c378423b8ce17c2ed.png)
(1)求滑块初始位于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b68a83af8bfb3cbe23debe9d7d02f969.png)
(2)若更换另一个质量为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ab1256702aef4e9f1a5eb6c12ecc96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ab1256702aef4e9f1a5eb6c12ecc96.png)
(3)若滑块的质量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0087c12357026f7c619be328eb3fb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a836168d64e8f50f84a2d2d064069541.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/327b9839-c1e9-43d0-bbd8-6976ad7c4951.png?resizew=209)
您最近一年使用:0次
解答题
|
较难
(0.4)
【推荐2】如图所示,ABC为固定在竖直面内的光滑四分之一圆轨道,其半径为r=10m,N为固定在水平面内的半圆平面,其半径为R=
m,轨道ABC与平面N相切于C点,DEF是包围在半圆平面N周围且垂直于N的光滑半圆形挡板,质量为M=1kg的长方体滑块的上表面与平面N在同一水平面内,且滑块与N接触紧密但不连接,现让物体自A点由静止开始下滑,进入平面N后受到挡板DEF的约束并最终冲上滑块,已知物体m=1kg,物体与平面N之间的动摩擦因数为μ1=0.5、与滑块之间的动摩擦因数为μ2=0.4,滑块与地面之间是光滑的,滑块的竖直高度为h=0.05m,长L=4m。(取g=10m/s2)
(1)物体滑到C处时对圆轨道的压力是多少;
(2)物体运动到F处时的速度是多少;
(3)当物体从滑块上滑落后到达地面时,物体与滑块之间的距离是多少。
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/30/0e8d9228-82ca-49b8-b0f1-3369cb487976.png?resizew=180)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ddc9aaa393ff2d8ace3b960c8ea56d8.png)
(1)物体滑到C处时对圆轨道的压力是多少;
(2)物体运动到F处时的速度是多少;
(3)当物体从滑块上滑落后到达地面时,物体与滑块之间的距离是多少。
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/30/0e8d9228-82ca-49b8-b0f1-3369cb487976.png?resizew=180)
您最近一年使用:0次