题目内容
汽车从10 m/s的速度开始刹车,刹车过程的加速度大小为2 m/s2,下列正确的是( )
A.前2 s汽车的位移是8 m |
B.前3 s汽车的位移是16 m |
C.前6 s汽车的位移是25 m |
D.前6 s汽车的位移是24 m |
C
试题分析:汽车做匀减速直线运动,刹车时间为t,则
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000928244522.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000928260968.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000928275938.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000928291858.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000928307775.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000928322561.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目
题目内容
A.前2 s汽车的位移是8 m |
B.前3 s汽车的位移是16 m |
C.前6 s汽车的位移是25 m |
D.前6 s汽车的位移是24 m |