题目内容
某物体以一定初速度沿斜面向上运动的最大位移为x,且x随斜面倾角θ的变化关系如图,重力加速度g=10m/s2,则
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250047503561802.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250047503561802.png)
A.物体初速度大小为5m/s |
B.物体和斜面之间动摩擦因素为![]() |
C.θ=53°时,x有最小值 |
D.x最小值为![]() |
AD
试题分析:据题意,从图可得当斜面倾角为900时,位移为
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750403599.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750434624.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750449603.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750496685.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750512775.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750527554.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750559297.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250047505741162.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750590665.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250047506211124.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750637658.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750590665.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750683506.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750699707.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750637658.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750746913.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750761480.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004750793469.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.物体初速度大小为5m/s |
B.物体和斜面之间动摩擦因素为![]() |
C.θ=53°时,x有最小值 |
D.x最小值为![]() |