2017年秋高一物理人教版必修 1同步习题:1.3运动快慢的描述——速度

适用年级:高一
试卷号:95570

试卷类型:课时练习
试卷考试时间:2017/10/8

1.单选题(共7题)

1.
下列关于平均速度的说法中不正确的是(  )
A.研究平均速度,要说明是哪段时间内的平均速度
B.研究平均速度,要说明是哪段位移内的平均速度
C.对于匀速直线运动,其平均速度与哪段时间或哪段位移无关
D.平均速度和瞬时速度都能精确地描述变速直线运动
2.
某人爬山,从山脚爬上山顶,然后又从原路返回到山脚,上山的平均速度大小为v1,下山的平均速度大小为v2,则往返的平均速度的大小和平均速率是
A.
B.
C. 0,
D. 0,
3.
以往公路上用单点测速仪测车速,但个别司机由于熟知测速点的位置,在通过测速点前采取刹车降低车速来逃避处罚,却很容易造成追尾事故,所以有些地方已开始采用区间测速,下列说法正确的是(  )
A.单点测速仪测的是汽车的瞬时速率
B.单点测速仪测的是汽车的平均速率
C.区间测速测的是汽车的瞬时速率
D.区间测速测的是汽车的平均速率
4.
在公路的每个路段都有交通管理部门设置的限速标志,如图所示,这是告诚驾驶员在这一路段驾驶车辆时
A.必须以这一速度行驶
B.瞬时速度大小不得超过这一规定数值
C.平均速度大小不得超过这一规定数值
D.汽车上的速度计指示值,有时还是可以超过这一规定值的
5.
在日常生活中,人们常把物体运动的路程与运动时间的比值定义为物体运动的平均速率某同学假日乘汽车到宿迁观光,在公路上两次看到路牌和手表如图所示,则该同学乘坐的汽车在该段时间内行驶的平均速率为  
A.B.C.D.
6.
物体通过两个连续相等位移的平均速度分别为v1=10 m/s,v2=15 m/s,则物体在整个运动过程中的平均速度是(  )
A.13.75 m/sB.12.5 m/s
C.12 m/sD.11.75 m/s
7.
关于平均速度和瞬时速度的说法中正确的是()
A.做变速运动的物体在相同时间间隔里的平均速度是相同的
B.瞬时速度就是运动的物体在一段较短的时间内的平均速度
C.平均速度就是初末时刻瞬时速度的平均值
D.某物体在某段时间里的瞬时速度都为零,则该物体在这段时间内静止

2.选择题(共1题)

8.

完形填空

    It was Christmas Eve 1881. I was 15 years old and feeling like the world was 1 for me because there hadn't been enough money to buy me the rifle that I'd wanted that year.

    Pa came back in and there was ice in his beard. “Come on, Matt,” Pa said. “Dress warmly. It's cold outside. We're going to Widow Jensen's. They are 2 wood.” Widow Jensen lived about two miles down the road. Her husband had died a year or so before and 3 her with three children, the oldest being eight.

    I 4 went out with Pa and we 5 the sled high with wood. 6 we went to the store and Pa took down a big ham, some bacon, a sack of flour and some shoes, which were put into a smaller sack. We rode the two miles to Widow Jensen's in 7. I tried to think through what Pa was doing. I knew we didn't have much money and Widow Jensen had 8 neighbors than us. It shouldn't have been our 9.

    Widow Jensen opened the door and let us in. She had a blanket wrapped around her 10. The children were wrapped in 11 and were sitting in front of the fireplace by a very small fire that 12 gave off any heat at all. “We brought you a few things , Ma'am,” Pa said and set down the sack of flour. I put the meat on the table. Then Pa handed her the sack that had the shoes in it.

    She 13 and took the shoes out one pair at a time. I watched her carefully. She bit her lower lip to keep it from 14 and then tears filled her eyes and started running down her cheeks. She looked up at Pa like she wanted to say something, 15 it wouldn't come out. “We brought a load of wood too, Ma'am,” Pa said. Then he turned to me and said,“Matt,go bring some in. ”

    I wasn't the 16 person when I went back out to bring in the wood. I choked and as much as I hate to 17 it, there were tears in my eyes too. In my mind I kept 18 those three kids huddled (蜷缩)around the fireplace and their mother standing there with tears running down her cheeks with so much 19 in her heart that she couldn't speak. Just then the rifle seemed very 20. Pa had given me the best Christmas of my life.

3.填空题(共2题)

9.
如图所示,两路灯灯杆A、B相距40m,一辆汽车用3.2s时间通过这两根路灯灯杆,据此可以计算出汽车在这段位移中的平均速度为________m/s。若灯杆A的近旁相距0.42m处有一块路牌,汽车驶过路牌和灯杆的这一小段距离只用了0.03s,在这段时间里的平均速度为________m/s,可以认为汽车驶过灯杆A时的瞬时速度为________m/s。
10.
一辆轿车沿直线公路行驶,前时间内做匀速运动的速度大小为60 m/s,接着时间内做匀速运动的速度大小为48m/s ,则整个时间段内的平均速度大小为________m/s;若轿车在前一半位移内平均速度大小为60m/s,后一半位移内平均速度为40m/s,则全程平均速度大小为__________m/s .

4.解答题(共1题)

11.
一辆汽车以20 m/s的速度沿平直的公路从甲地开往乙地,又以30 m/s的速度从乙地开往丙地.已知甲、乙两地间的距离与乙、丙两地间的距离相等,求该汽车在从甲地开往丙地的过程中的平均速度的大小.有一位同学是这样解的:v=m/s=25 m/s,请问上述解法正确吗?为什么?应该如何解?
试卷分析
  • 【1】题量占比

    单选题:(7道)

    选择题:(1道)

    填空题:(2道)

    解答题:(1道)

  • 【2】:难度分析

    1星难题:0

    2星难题:0

    3星难题:0

    4星难题:0

    5星难题:0

    6星难题:2

    7星难题:0

    8星难题:7

    9星难题:1