1 . 一座足够高的楼房如图所示,现在其楼顶边缘的外侧O点竖直向上以10m/s的初速度抛出一个小钢球(可视为质点),点
和
为抛出点正下方楼房外墙上两点,且
。已知小钢球从
下落到
所需时间为1s,不计空气阻力,重力加速度
。则点
和
间的距离为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/6bc7cec8-213b-4d3e-bd05-784c569e229e.png?resizew=179)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f4189e94c7147d8c72e75ec8da8984b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a6a294d3d7206bcdde5b943dbe94f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/6bc7cec8-213b-4d3e-bd05-784c569e229e.png?resizew=179)
A.25m | B.20m | C.15m | D.12m |
您最近一年使用:0次
2 . 2020珠峰高程测量登山队于5月27日成功登顶。若某测绘人员用一端带有弹射器且足够长的真空管测量重力加速度,如图所示。真空管竖直放置,启动弹射器,同时自动计时器开始计时,管内的小球从离开弹射器到再次落回用时为t,已知小球离开弹射器时的速度大小为v,则当地的重力加速度大小为( )
![](https://img.xkw.com/dksih/QBM/2020/7/27/2514704265142272/2514996047355904/STEM/ca5cf919-f96a-437c-953f-f9cfcb239096.png?resizew=30)
![](https://img.xkw.com/dksih/QBM/2020/7/27/2514704265142272/2514996047355904/STEM/ca5cf919-f96a-437c-953f-f9cfcb239096.png?resizew=30)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-07-27更新
|
90次组卷
|
3卷引用:山西省长治市名校2019-2020高二下学期期末联合考试物理试题