题目内容
质量为10kg的物体,在变力F作用下沿x轴做直线运动,力随位移x的变化情况如图所示.物体在x=0处速度为1m/s,一切摩擦不计,则物体运动到x=16m处时,速度大小为( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250013192033857.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250013192033857.png)
A.2![]() | B.3m/s | C.4m/s | D.![]() |
B
试题分析:物体从x=0到x=16m处力F做的功等于图像与x轴所围成的面积,即W=
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250013192491102.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001319265916.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.2![]() | B.3m/s | C.4m/s | D.![]() |