甲乙两位同学对跑步时应该采取什么策略争论不休,甲同学认为应该保持匀速,乙同学认为应该保存体力,先慢后快,他们最终决定进行一次实战练习.两人同时从起点出发,跑向终点,两人距终点距离y(米)与时间x(秒)的关系如图所示,请你根据图象,回答下列问题:
![](https://img.xkw.com/dksih/QBM/2022/5/2/2970657090199552/2971429249490944/STEM/45c28c21-7a62-4ec1-8bfb-3cf16a1e461e.png?resizew=280)
(1)两人比赛的全程是______米,______同学先到达终点;
(2)两人相遇时乙的速度为_______m/s:
(3)两人相遇前他们在何时相距40米?
![](https://img.xkw.com/dksih/QBM/2022/5/2/2970657090199552/2971429249490944/STEM/45c28c21-7a62-4ec1-8bfb-3cf16a1e461e.png?resizew=280)
(1)两人比赛的全程是______米,______同学先到达终点;
(2)两人相遇时乙的速度为_______m/s:
(3)两人相遇前他们在何时相距40米?
更新时间:2022-05-03 14:11:11
|
相似题推荐
解答题-应用题
|
适中
(0.65)
名校
【推荐1】
、
两地相距
,甲、乙两人同时从
地出发匀速前往
地,甲到达
地时乙距
地
.甲到达
地后立刻以原速返回
地,返回途中与乙相遇,相遇后乙也立刻以原速返回
地.甲、乙离
地的距离
与他们出发后经过的时间
的函数关系如图所示.
,
.
(2)求甲从
地返回
地时,甲离
地的距离
与他出发后经过的时间
的函数关系式.
(3)甲回到
地后,再过
,乙也回到
地.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3a951496357f556654818f843e0c433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2351df22087d65be69519770be21c20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)求甲从
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)甲回到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ce48eafd36547782174eb304d4a003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】甲,乙两辆汽车分别从A,B两地同时出发,沿同一条公路相向而行,乙车出发
后休息,与甲车相遇后,继续行驶.设甲、乙两车与B地的路程分别为
,
,甲车行驶的时间为
,
,
与x之间的函数图像如图所示,结合图像解答下列问题:
![](https://img.xkw.com/dksih/QBM/2022/10/9/3083860994482176/3131483354808320/STEM/feb13a4cbd2a4758a96e29e8eb5c87d0.png?resizew=197)
(1)A、B两地相距
;
(2)求乙车与甲车相遇后,
与x之间的函数表达式;
(3)甲、乙两辆汽车出发多长时间两车相距
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c647c64600a583a91bb8bb6d3c06441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc37ebf9a85f13afec4ce7c5de01739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8fca640c6bc3b7f59ba2e1f6c0ad8b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddaba6265e4fb9fb730209287ea2d738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4f70bafe01d850c4f7f009acfef90c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a857599dd7e5babfbe61124db4e09cf.png)
![](https://img.xkw.com/dksih/QBM/2022/10/9/3083860994482176/3131483354808320/STEM/feb13a4cbd2a4758a96e29e8eb5c87d0.png?resizew=197)
(1)A、B两地相距
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5fe30c67ac20cd4e8b9cc2d0d420a7b.png)
(2)求乙车与甲车相遇后,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a857599dd7e5babfbe61124db4e09cf.png)
(3)甲、乙两辆汽车出发多长时间两车相距
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870cd01b72fc36199688bc1be099a86e.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,直线
与x轴交于点A,点
也在该直线上,点B关于x轴的对称点为点C,直线
交x轴于点D,点E坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/18/a42b708b-2d11-44b0-b056-5151a66a074a.png?resizew=191)
(1)m的值为______,点C的坐标为______;
(2)求直线
的函数表达式;
(3)晶晶有个想法:“设
. 由点B与点C关于x轴对称易得
,而
与四边形
拼接后可看成
,这样求S便转化为直接求
的面积.”晶晶的想法对吗?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3146b29be9ec7a28c73278e068b5163.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f070ad19b3554af42443e610b43b4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209a97e53f955e2de91308fdfa19e86e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/18/a42b708b-2d11-44b0-b056-5151a66a074a.png?resizew=191)
(1)m的值为______,点C的坐标为______;
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)晶晶有个想法:“设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5d887077e4f2e9ee2ccbd8a3f4eaa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d85e03bbb100a049669a84620c5dce0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fc49d59780ac9ee753577697d087cbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd5a1e516644950ef35eafd859b262f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd5a1e516644950ef35eafd859b262f1.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知抛物线
的顶点为Q,与x轴交于A,B两点(点A在点B的左侧),与y轴交于点C,该抛物线的对称轴交x轴于点D.
(1)求点A,B,C的坐标;(用含a,b的代数式表示)
(2)当
时,求点D的坐标;
(3)当
时,点P是抛物线上点B右侧的任意一点,直线AP,BP分别交抛物线的对称轴于点M,N.求证:
是一个定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780707e780554c65aec273d40a1b50c0.png)
(1)求点A,B,C的坐标;(用含a,b的代数式表示)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/336ed20830bd9ada352b724486c3613b.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b109da727d30a4af0d6069099d8e32.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】甲,乙两车从甲地驶向B地,并各自匀速行驶,甲车比乙车早行驶
,并且甲途中休息了
,如图是甲,乙两车行驶的距离
与时间
的函数图形.
,
.
(2)求甲车休息之后的函数关系式.
(3)当乙车到达B地时,甲车距B地还有多远?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c647c64600a583a91bb8bb6d3c06441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad17d5a4dd7e667eba2e66b44a981c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f98020c762bb0bd7f24f82f927be8227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b11be6dd6af544407a1d7da7225a7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
(2)求甲车休息之后的函数关系式.
(3)当乙车到达B地时,甲车距B地还有多远?
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】某货运公司派一辆汽车将一批商品从甲地运往乙地货仓,卸货后,返回甲地,设离开甲地的时间为x(h),与甲地的距离为y(km),汽车的整个运输过程如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/7663df79-a0ec-40e3-af12-eefcfc27be6e.png?resizew=352)
(1)根据图象,请判断汽车在乙地停留了多少小时?
(2)求出距离y与时间x之间的函数关系式,并写出x的取值范围.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/7663df79-a0ec-40e3-af12-eefcfc27be6e.png?resizew=352)
(1)根据图象,请判断汽车在乙地停留了多少小时?
(2)求出距离y与时间x之间的函数关系式,并写出x的取值范围.
您最近一年使用:0次