题目内容
一小球沿半径为2 m的轨道做匀速圆周运动,若周期为π s,则 ( ).
A.小球的线速度是4 m/s |
B.经过![]() |
C.经过![]() ![]() |
D.以上说法均不正确 |
AC
ω=
=
rad/s=2 rad/s,v=rω=2×2 m/s=4 m/s.经过t=
s,小球转过
圆周,则位移为
r=2
m.
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003727026504.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003727057450.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003726979396.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003727088303.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003727010344.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003727010344.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目
题目内容
A.小球的线速度是4 m/s |
B.经过![]() |
C.经过![]() ![]() |
D.以上说法均不正确 |