一物体仅受两个互相垂直的力
和
作用通过一段位移,力
对物体做功4J,力
对物体做功
J,则此过程中( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
A.力![]() ![]() |
B.力![]() ![]() |
C.物体的动能增加7J |
D.物体的机械能增加7J |
10-11高三上·河南·阶段练习 查看更多[1]
(已下线)2011届河南省豫南九校高三上学期第二次联考物理试卷
更新时间:2016-12-07 17:54:47
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