题目内容
时针、分针和秒针转动时,下列正确说法是
A.秒针的角速度是分针的60倍 | B.分针的角速度是时针的12倍 |
C.秒针的角速度是时针的360倍 | D.秒针的角速度是时针的86400倍 |
AB
试题分析:时针的周期是12h,分针的周期是1h,秒针的周期是1min.由公式
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824200233366619.png)
A、
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824200234443941.png)
B、
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824200235176882.png)
C、
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242002360811005.png)
D、
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242002360811005.png)
故选:AB
点评:该题为基本公式的应用,一定要搞清楚时针、分针、秒针的周期比.本题容易将时针的周期误算为24h.
![](http://thumb2018.1010pic.com/images/loading.gif)
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