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在GGB中制作小船渡河动态演示课件

  • 2026-06-24 23:42:26
在GGB中制作小船渡河动态演示课件

在GGB中制作小船渡河动态演示课件

本文详细介绍如何在 GeoGebra 中制作小船渡河的动态演示课件,涵盖几何框架搭建、按钮控制、小船图片关联、河流水流模拟等完整流程,适合物理教师制作课堂演示素材。

01

一、创建渡河的几何框架

步骤如下表所示:

序号
名称
描述
数值
标题
1
点 O
x轴与y轴的交点
O = (0, 0)
2
点 d
y轴上的点
d = (0, 4.7)
3
直线 f
经过点d且垂直于y轴的直线
f: y = 4.7
4
点 A
x轴上的点
A = (3.48, 0)
5
点 A'
A关于O的镜像
A' = (-3.48, 0)
6
弧线 c
经过A'与A的半圆
c = 10.93
7
点 调船向
c上的点
调船向 = (-2.14, 2.74)
8
射线 g
端点为O且经过点 调船向 的射线
g: -2.74x - 2.14y = 0
9
向量 u
向量(O, A)
u = (3.48, 0)
10
点 调船速
g上的点
调船速 = (-1.33, 1.71)
11
向量 v
向量(O, 调船速)
v = (-1.33, 1.71)
12
点 C'
调船速按向量u平移
C' = (2.15, 1.71)
13
向量 w
向量(调船速, C')
w = (3.48, 0)
14
点 A'₁
A按向量v平移
A'₁ = (2.15, 1.71)
15
向量 b
向量(O, C')
b = (2.15, 1.71)
16
线段 h
线段调船速C'
h = 3.48
17
线段 i
线段AC'
i = 2.17
18
射线 j
端点为O且经过点C'的射线
j: -1.71x + 2.15y = 0
19
点 D
f与j的交点
D = (5.91, 4.7)
20
线段 k
线段OD
k = 7.55
21
复数 E
k上的点
E = 1.06 + 0.84i

📷 

02

二、创建按钮等操作工具

步骤如下表:

序号
名称
描述
数值
标题
22
按钮 button1
button1
复位
23
布尔值 a
a = false
24
按钮 button2
button2
启动/暂停

⚠ 需要注意的事项

1、按钮等控制部分放在绘图区2中。点选右上角三个横线:视图 —— 绘图区2,隐藏绘图区2中的坐标系。

2、选择按钮工具,点击绘图区2,在弹出的对话框中依次填写:

标题为:复位
代码为:赋值[E,0]

3、选择复选框工具,在绘图区2点击:确定,创建复选框布尔值 a。

4、选择按钮工具,点击绘图区2,在弹出的对话框中依次填写:

标题为:启动/暂停
代码为:

赋值[a,¬a]
启动动画[E,a]

5、这里的代码为多行时,按回车后按钮创建成功,此时里面只有一行代码。鼠标右键点击,在弹出的对话左框中点击设置 → 脚本,就可以在里面添加第2行代码了。

03

三、插入小船图片并实现和点E关联

步骤如下表:

序号
名称
描述
数值
标题
25
直线 l
经过点E,方向向量为v的直线
l: -1.71x - 1.33y = -2.93
26
数值 r
r = 0.8
27
圆 e
圆心为E且半径为r的圆
e: (x - 1.06)² + (y - 0.84)² = 0.64
28
点 F
e与l的交点
F = (0.57, 1.47)
29
点 G
e与l的交点
G = (1.55, 0.21)
30
图片 pic1
pic1
31
点 H
(x(G), y(G))
H = (1.55, 0.21)
32
点 I
(x(F), y(F))
I = (0.57, 1.47)

⚠ 需要注意的事项

1、过点E创建向量V的平行线 l,目的是将船身与V平行

2、过E点作一个圆,创建圆与 l 的交点F和G。

3、插入准备好的图片:点击图片工具,在弹出的对话框中选择上传 → 浏览,找到预先保存好的图片(小船的俯视图,横放,船头向右)。

4、插入的图片有两个控制点,显示其标签为H和I。双击H,在弹出的对话框中输入如下指令替换原来的坐标:(x(G), y(G)),双击I,在弹出的对话框中输入如下指令替换原来的坐标:(x(F), y(F))

📷 

04

四、创建小河和水流情景

步骤如下表:

序号
名称
描述
数值
标题
33
点 J
y轴上的点
J = (0, 5.2)
34
直线 m
经过点J且垂直于y轴的直线
m: y = 5.2
35
点 K
y轴上的点
K = (0, -0.42)
36
直线 n
经过点K且垂直于y轴的直线
n: y = -0.42
37
数值 L
L = 11
38
点 M
(x(K) + L, y(K))
M = (11, -0.42)
39
点 N
(x(J) + L, y(J))
N = (11, 5.2)
40
点 M'
M关于K的镜像
M' = (-11, -0.42)
41
点 N'
N关于J的镜像
N' = (-11, 5.2)
42
四边形 q1
多边形N', M', M, N
q1 = 123.64
42
线段 n'
线段N'M'
n' = 5.62
42
线段 m'
线段M'M
m' = 22
42
线段 m₁
线段MN
m₁ = 5.62
42
线段 n₁
线段NN'
n₁ = 22
43
角度 α
α = 168°
44
函数 p
0.75y(d) + 0.3sin(x - α)
p(x) = 0.75 × 4.7 + 0.3sin(x - 168°)
45
函数 q
0.5y(d) + 0.3sin(x - α)
q(x) = 0.5 × 4.7 + 0.3sin(x - 168°)
46
函数 s
0.25y(d) + 0.3sin(x - α)
s(x) = 0.25 × 4.7 + 0.3sin(x - 168°)

⚠ 需要注意的事项

创建了三条函数图像后,修改样式为蓝色、虚线。在"启动/暂停"按钮的属性窗口里添加一行指令:

启动动画[α, a]

🎬

制作好了,看一下效果吧

最短时间渡河

📷 

     最短航程渡河(船速大于水速)

📷 

           最短航程渡河(船速小于水速)

📷 

📖 本文参考乔永海著《Geogebra软件和高中物理的深度融合》一书。

📌 更多教学资源,欢迎关注「赵海全名师工作室」

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  1. CONNECT:[ UseTime:0.000505s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000755s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000298s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000255s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000486s ]
  6. SELECT * FROM `set` [ RunTime:0.000202s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000500s ]
  8. SELECT * FROM `article` WHERE `id` = 515586 LIMIT 1 [ RunTime:0.000498s ]
  9. UPDATE `article` SET `lasttime` = 1782400784 WHERE `id` = 515586 [ RunTime:0.011316s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000283s ]
  11. SELECT * FROM `article` WHERE `id` < 515586 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000459s ]
  12. SELECT * FROM `article` WHERE `id` > 515586 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.013254s ]
  13. SELECT * FROM `article` WHERE `id` < 515586 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.012945s ]
  14. SELECT * FROM `article` WHERE `id` < 515586 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.014115s ]
  15. SELECT * FROM `article` WHERE `id` < 515586 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.035890s ]
0.159744s