一座拱桥桥洞的截面边界由抛物线弧段
和矩形
的三边组成,拱的顶部
距离水面
m,水面上的矩形的高度为2m,水面宽6m,如图所示.一艘船运载一个长方体形的集装箱,此箱平放在船上.已知船宽
m,船面距离水面1.
m,集装箱的尺寸为长×宽×高=
m.试问此船能否通过此桥?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf126cfed85fa9b7720ec6f7b0008dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a320006c0d5007e9a1e72941ab6383.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/22/cace5e41-632c-4d02-a7ed-aedb43fae183.png?resizew=180)
更新时间:2016-12-03 09:29:13
|
【知识点】 抛物线的应用
相似题推荐
解答题-问答题
|
较易
(0.85)
名校
【推荐1】已知
是抛物线
上一点,
为
的焦点.
(1)若
,
是
上的两点,证明:
,
,
依次成等比数列.
(2)若直线
与
交于
,
两点,且
,求线段
的垂直平分线在
轴上的截距.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266504a4bd910b292c74765dc9772f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbb6cbf601c8d08db363827baefc296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20171b65c618928b3f93d5996374722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54dfb134869d6058b3d97ed01658ade0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33b315a25c667233befb2a1d542eb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a052a4645628e5ba018f5e2f17c1138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4428dc4e1db8f04c28ba1a4e3b3d2bc9.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f514aac874d83740f54a9a717149d00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6f5adf13b4214666292dd64b947741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af405a054bfe7fb7ce40e48d816467e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55fc2bcbded30ecb9441f8fb4c8773c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐2】如图,河道上有一座抛物线型拱桥,在正常水位时,拱圈最高点距水面为8m,拱圈内水面宽16m.,为保证安全,要求通过的船顶部(设为平顶)与拱桥顶部在竖直方向上高度之差至少要有0.5m.
(1)一条船船顶部宽4m,要使这艘船安全通过,则船在水面以上部分高不能超过多少米?
(2)近日因受台风影响水位暴涨2.7m,为此必须加重船载,降低船身,才能通过桥洞.试问:一艘顶部宽
m,在水面以上部分高为4m的船船身应至少降低多少米才能安全通过?
(1)一条船船顶部宽4m,要使这艘船安全通过,则船在水面以上部分高不能超过多少米?
(2)近日因受台风影响水位暴涨2.7m,为此必须加重船载,降低船身,才能通过桥洞.试问:一艘顶部宽
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
![](https://img.xkw.com/dksih/QBM/2011/5/8/1570185549684736/1570185554550784/STEM/ba09ce01-71d6-406b-b775-f05b0df16bc2.png?resizew=173)
您最近一年使用:0次