Monday, October 22, 2012
Test reflection...
Reflect on the exam:
Look through the objectives from the Unit sheet. Rank yourself 0 to 4 on the unit sheet in the "end of unit" column.
1. Which objective do you think you did the best on? Why?
I believe that vocabulary was one of my strongest objectives for this test. Last test I struggled with the vocabulary. So before taking this test I made an effort to review the vocabulary terms and ensure that I could easily define each word, use it in a sentence, and apply them to problems.
2. Which objective do you think you need the most improvement on? Why?
I had a real hard time with solving systems on the test. I think I did not review how to do systems because I have been fairly good at them in the past. However, after not practicing solving systems for a long time I seemed to forget everything I knew as soon as I got my test.
3. What can you do to improve on the objective you may still need help on?
I can use the book to review how to do them. I can also do practice problems, or come in for help until I am able to do them well.
Friday, October 12, 2012
CV Formative Assessment
1. Total distance: 6 meters
2. Displacement: + 2 meters
3. No, the displacement is less than the total distance because the ball rolled all the way to the wall- then bounced back. The distance measures the number of meters to the wall & back to the place where the ball finally stopped. Whereas, the displacement measures just the number of meters from the origin to the end point.
2. Displacement: + 2 meters
3. No, the displacement is less than the total distance because the ball rolled all the way to the wall- then bounced back. The distance measures the number of meters to the wall & back to the place where the ball finally stopped. Whereas, the displacement measures just the number of meters from the origin to the end point.
Wednesday, October 3, 2012
Tumble Buggy Lab (Data & Graph)
![Text Box: Displacement: cm (+/- 3cm)](file:///C:\Users\Sonia\AppData\Local\Temp\msohtmlclip1\01\clip_image001.png)
Time (seconds)
|
Trial #1
|
Trail #2
|
Trail #3
|
Trail #4
|
Trail#5
|
Average
|
Uncertainty
|
2
|
59
|
59
|
60
|
60
|
61
|
60
|
+/- 0.95
|
4
|
123
|
117
|
116
|
119
|
120
|
119
|
+/- 3
|
6
|
184
|
179
|
180
|
178
|
180
|
180
|
+/- 1.5
|
8
|
284
|
281
|
280
|
281
|
283
|
281
|
+/- 1.5
|
10
|
393
|
390
|
392
|
390
|
391
|
391
|
+/- 1.5
|
Graph:
Mathematical Relationship:
Time= 41.3 (cm/second) * Distance -41.2
^ In theory, this number should be zero
Explanation of uncertainty:
Due to human error, the uncertainty in the X- axis was 0.2 seconds.
The uncertainty in the Y-axis was originally 3 cm because the largest range of measurements was 6 cm (divided by 2= three centimeters.) However, due to the nature of the car, in that it did not drive in a strait line, i had to add a large uncertainty (25cm) to account for the curved path of the tumble buggy. This is also the reason for the presence of a y-intercept (when theoretically there should not be one.)
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