| << Chapter < Page | Chapter >> Page > |
Tactile graphics
The svg file named Phy1080b1 contains a graph that shows the trajectory of the arrow for firing angles of both 45 degrees and 60 degrees. The vertical axisshows the height in feet and the horizontal axis shows the flight distance in feet.
The image contained in this file is shown in Figure 9 for the benefit of your assistant who will manually emboss the diagram. Note that as usual, this is amirror image of the image that is to be presented to the student after embossing. A non-mirror-image version is shown in Figure 10 .
| Figure 9 . Mirror image contained in the file named Phy1080b1.svg. |
|---|
 |
| Figure 10 . Non-mirror-image contained in the file named Phy1080b1.svg. |
|---|
 |
Key-value pairs
The key-value pairs for the image in the file named Phy1080b1 are shown in Figure 11 .
| Figure 11 . Key-value pairs for the image in Phy1080b1.svg. |
|---|
m: Trajectory for two different firing angles
n: 120o: Height in feet
p: 0q: 0
r: Distance in feets: 265
t: 315u: 60 degrees
v: 45degrees
w: File: Phy1080b1.svg |
Analysis of the output
Figure 8 contains the x and y coordinates of the arrow's position every 0.25 seconds from the time that it is released until it strikes the ground alittle less than 4.5 seconds later.
If you are unable to create tactile graphics based on the file named Phy1080b1.svg, I recommend that you plot the arrow's positions on your graph board in orderto get a feel for the shape of the trajectory This is a classic trajectory curve that applies to many different types of projectiles.
Compute for a different angle
Next, I recommend that you modify the script by changing the value of the variable named ang from 45 degrees to 60 degrees and load the modified version of the html file into your browser. This should produce the output shown in Figure 12 . This output is also plotted in the image in the file named Phy1080b1.svg.
| Figure 12 . Screen output for Listing #4 at 60 degrees. |
|---|
Start Script
t = 0.00 seconds x = 0.0 feet y = 6.0 feett = 0.25 seconds x = 12.5 feet y = 26.7 feet
t = 0.50 seconds x = 25.0 feet y = 45.3 feett = 0.75 seconds x = 37.5 feet y = 61.9 feet
t = 1.00 seconds x = 50.0 feet y = 76.5 feett = 1.25 seconds x = 62.5 feet y = 89.1 feet
t = 1.50 seconds x = 75.0 feet y = 99.7 feett = 1.75 seconds x = 87.5 feet y = 108.3 feet
t = 2.00 seconds x = 100.0 feet y = 114.8 feett = 2.25 seconds x = 112.5 feet y = 119.4 feet
t = 2.50 seconds x = 125.0 feet y = 121.9 feett = 2.75 seconds x = 137.5 feet y = 122.4 feet
t = 3.00 seconds x = 150.0 feet y = 120.9 feett = 3.25 seconds x = 162.5 feet y = 117.4 feet
t = 3.50 seconds x = 175.0 feet y = 111.9 feett = 3.75 seconds x = 187.5 feet y = 104.3 feet
t = 4.00 seconds x = 200.0 feet y = 94.8 feett = 4.25 seconds x = 212.5 feet y = 83.2 feet
t = 4.50 seconds x = 225.0 feet y = 69.7 feett = 4.75 seconds x = 237.5 feet y = 54.1 feet
t = 5.00 seconds x = 250.0 feet y = 36.5 feett = 5.25 seconds x = 262.5 feet y = 16.9 feet
t = 5.50 seconds x = 275.0 feet y = -4.7 feetEnd Script |
Notification Switch
Would you like to follow the 'Accessible physics concepts for blind students' conversation and receive update notifications?
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|