当前位置:首页>学习笔记>【2026版高中物理粤教版必修一册学习笔记练透word培优讲义作业5测量直线运动物体的瞬时速度

【2026版高中物理粤教版必修一册学习笔记练透word培优讲义作业5测量直线运动物体的瞬时速度

  • 2026-03-25 13:53:38
【2026版高中物理粤教版必修一册学习笔记练透word培优讲义作业5测量直线运动物体的瞬时速度

(分值:50分)

1~3题每题3分,411分,共20

1.打点计时器是记录做直线运动的物体位置和时间的仪器,利用打点计时器打出的纸带,可以获得运动物体的相关信息。下列信息不能获得的是(  )

A.物体运动的时间

B.物体在不同时刻的位置

C.物体的质量

D.物体速度变化的情况

2.如图所示,图甲是电磁打点计时器的示意图,图乙是该打点计时器在某次实验中打出的纸带,则以下说法中正确的是(  )

A.将该打点计时器接在4~6 V的直流电源上,它将在纸带上每隔0.02 s打一个点

B.当打点计时器正常工作时,纸带上点迹越疏的地方表示纸带的运动速度越小

C.若纸带上打出DF两点的时间间隔为Δt,两点间距离为Δx,则可以大致表示纸带上DF之间任何一点的瞬时速度

D.DF两点间距离过小,测量误差会增大,所以实际测量中DF之间的距离越大越好

3.在测量纸带的速度的实验中,得到如图所示的纸带,其中ABCDEFG为计数点,相邻两计数点间的时间间隔为T,s1s2s3s4s5s6分别为ABBCCDDEEFFG的长度,下列用来计算打D点时纸带速度的表达式中误差最小的是(  )

A.B.

C.D.

4.(11分)(1)(6分)如图中甲、乙两种打点计时器是高中物理实验中常用的实验器材,请回答下面问题:

甲图是(选填电磁打点电火花)计时器,电源采用的是(选填直流电源交流电源),工作电压为V。 

乙图是(选填电磁打点电火花)计时器,电源采用的是(选填直流电源交流电源),工作电压为V。 

(2)(2分)在测量小车的瞬时速度的实验中,下列说法正确的是。 

A.在释放小车前,小车应靠近打点计时器

B.开始实验时应先释放小车,再接通电源

C.打点计时器打两个点的时间间隔由小车运动的快慢来决定

D.纸带速度越大,相邻的两个点间距离越大

(3)(3分)某同学在做练习使用打点计时器实验时打出的纸带如图所示,每两个计数点之间还有四个计时点没有画出,图中已标出相邻两计数点间的距离,打点计时器的电源频率为50 Hz(结果保留三位有效数字)。

图中纸带右端和运动物体相连,由此推测物体的运动是(填加速减速)运动。 

在打出3、6这两点的时间间隔中,纸带运动的平均速度是 m/s。 

如果要求不是很精确,用平均速度可以粗略地代替某点瞬时速度,那么,在打计数点4时物体的瞬时速度更接近于 m/s。 

5~7题每题6分,共18

5.(6分)如图所示,用数字计时器研究物体的直线运动。1和2是固定在斜面上适当位置的两个光电门,让滑块从斜面的顶端滑下,光电门1、2各自连接的数字计时器显示的挡光时间分别为5.00×10-2 s、2.00×10-2 s。滑块从光电门1运动到光电门2的时间间隔为Δt=0.31 s,已知滑块沿斜面方向的宽度为5.00 cm,测得光电门1和2之间的距离为0.54 m。(结果均保留三位有效数字)

(1)(4分)滑块通过光电门1时的速度v1= m/s,通过光电门2时的速度v2= m/s。 

(2)(2分)滑块从光电门1运动到光电门2的这段时间内的平均速度为 m/s。 

6.(6分)某学生在实验室中用打点计时器来测量小车的瞬时速度,该同学用打点计时器记录了被小车拖动的纸带的运动情况,在纸带上确定出ABCDEFG共7个计数点,相邻计数点间的距离如图所示,每两个相邻的计数点之间还有4个计时点未画出,电源频率为50 Hz。

(1)(2分)根据纸带计算出打下B点时小车的瞬时速度,要求保留3位有效数字。

计数点

B

C

D

E

F

速度/(m·s-1

0.477

0.558

0.638

0.719

(2)(2分)以打下A点的时刻为计时起点,将BCDEF各点对应的瞬时速度标在直角坐标系中,并画出小车的瞬时速度随时间变化的关系图线。

通过网盘分享的文件:word讲义

链接: https://pan.baidu.com/s/1ApPu4Bf1G3WQmBT-14h94g?pwd=4321 提取码: 4321 

--来自百度网盘超级会员v8的分享

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  1. CONNECT:[ UseTime:0.001131s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001926s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000872s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000733s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001401s ]
  6. SELECT * FROM `set` [ RunTime:0.000603s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001424s ]
  8. SELECT * FROM `article` WHERE `id` = 477082 LIMIT 1 [ RunTime:0.001049s ]
  9. UPDATE `article` SET `lasttime` = 1774423896 WHERE `id` = 477082 [ RunTime:0.023520s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.005222s ]
  11. SELECT * FROM `article` WHERE `id` < 477082 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001483s ]
  12. SELECT * FROM `article` WHERE `id` > 477082 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001246s ]
  13. SELECT * FROM `article` WHERE `id` < 477082 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002240s ]
  14. SELECT * FROM `article` WHERE `id` < 477082 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002110s ]
  15. SELECT * FROM `article` WHERE `id` < 477082 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.019807s ]
0.171659s