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.

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.

Tumble Buggy Lab (Data & Graph)

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.)