题目内容
力的分解在实际生活中有很多应用。如图所示为门锁关门时的示意图,锁舌尖角为37°,此时锁壳碰锁舌的力为40N,锁舌表面较光滑,摩擦不计,则关门时弹簧正处于_________ (选填“压缩”、“拉伸”或者“正好原长”) 状态,此时弹簧的弹力为________N。(sin37°=0.6,cos37°=0.8)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241338317046413.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241338317046413.png)
压缩,24
锁舌受到向左的弹力和垂直斜面向下的40N的力的作用,40N水平向右的分力等于弹簧弹力,弹簧弹力为40N![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824133831736795.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824133831736795.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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