如图,质量为
的雪橇在倾角
的斜坡向下滑动过程中,所受的滑动摩擦力为定值,空气阻力与速度成正比,比例系数
。雪橇运动的某段过程
图像如图中实线AD所示,且AB是曲线最左端那一点的切线,B点的坐标为(4,9),CD线是曲线的渐近线,已知
。下列说法中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/3353f9fa-5d61-4231-96c1-ad3eb36c7463.png?resizew=157)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fda5655ef480683a2d3b74f0b523439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/997a0ac9e741f3a73623a23eb2da79c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1552707683293dcf684d101dd09b5c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f986badfc5dea707c164e2ab6c98dd06.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/3353f9fa-5d61-4231-96c1-ad3eb36c7463.png?resizew=157)
A.当![]() ![]() |
B.在![]() ![]() |
C.雪橇与斜坡间的动摩擦因数是![]() |
D.雪橇的质量![]() |
更新时间:2022-11-25 21:08:29
|
【知识点】 牛顿运动定律与图像结合
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【推荐1】雨滴在高空形成后,由静止开始沿竖直方向下落,雨滴受到空气阻力的作用。当雨滴速度为
时开始计时,其运动的速度v随时间t的变化关系如图所示,经过时间
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A.雨滴运动的速度不断减小 | B.雨滴运动的加速度不断增大 |
C.雨滴的合力不断增大 | D.雨滴受到的阻力不断增大 |
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【推荐2】如图所示,质量相同都为m,但表面粗糙程度不同的三个物块a、b、c放在三个完全相同的斜面体上,质量为M倾角为θ的斜面体静置于粗糙水平面上。物块a、b、c以相同初速度下滑,其
图像如图所示。物块下滑过程中斜面体始终保持静止,a、b、c与斜面之间的动摩擦因数分别为
、
、
,斜面体对地面的压力分别为
、
、
,斜面体对地面的摩擦力分别为
、
、
。下列哪些结论是正确的( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/9a3386c4-2916-48ce-87ed-ee28643489a6.png?resizew=530)
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57ece5cfa85bfe95572dd46278b619b.png)
②
,
且方向水平向右
③
,
且方向水平向右
④
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ba62e7cedbd7ec69cadad7502293b0.png)
⑤
,
且方向水平向左
⑥
,
且方向水平向左
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1552707683293dcf684d101dd09b5c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95c2253aad90b8c3f14d1cef6a914f4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212fc10d24d99d4f50e245811b0528eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6977ca3176bb17f1458c6a684d45511d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8ec0bd30cae3f949ce67da009b133d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/081c6f3b0861a7d4127dca8c578b6e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306a5928659b3a6c332cc53a21d59524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58e29990d3b06a216786bbb96120e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9ac7f594782757b71291b1f12e3e0cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4fe692faf888d237dd6c9f55fb9920f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/9a3386c4-2916-48ce-87ed-ee28643489a6.png?resizew=530)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57ece5cfa85bfe95572dd46278b619b.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75561f0a300e099c67b378857cd731db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5ddb14c5ed0f3386cad0557a7e1f139.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbff65d055fcba2502d8aeed2af51e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb3b83c459ec652f8f82730f630716db.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80640c2f4de3d11132db2ab94e9990e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ba62e7cedbd7ec69cadad7502293b0.png)
⑤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75561f0a300e099c67b378857cd731db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5ddb14c5ed0f3386cad0557a7e1f139.png)
⑥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbff65d055fcba2502d8aeed2af51e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5787eef346011de06064d829cd15241d.png)
A.①④③ | B.①③⑤ | C.②④⑥ | D.①④⑥ |
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