3.1 Trial Test and Design Modification
Run Number
|
Run 1
|
Rerun 1
|
Rerun 2
|
Total time of Run
| 2s |
1s
|
1s
|
Total distance of Run
|
2m
|
1m
|
>1m
|
Time for lever to fully release
| 2s |
1s
|
1s
|
Distance car travels while lever is releasing
|
2m
|
1m
|
>1m
|
Observations – did car travel smoothly,
straight, always forward, etc?
|
The car travelled smoothly in a straight line. However, the wheels were not attached tightly enough to the axle and did not always turn along with the axle.
|
The car stopped immediately after the rod snapped back. The car travelled in a straight line.
|
The car travelled for a short distance after the rod snapped back and then moved backwards slightly. The car travelled in a straight line.
|
Did lever / string operate smoothly?
| Yes. |
No.
|
Yes.
|
Filename of video recorded is:
| Mousetrap Car Run 1 by S3-06 Group C |
Mousetrap Car Rerun 1 by S3-06 Group C
|
Mousetrap Car Rerun 2 by S3-06 Group C
|
Area for improvement (1 only)
|
Wheels could be glued onto the axle.
|
The string could be thickened and lengthened.
|
The rod could be lengthened.
|
Possible reason (1 only)
|
Wheels would be more securely attached to the axle and would turn with the axle.
|
With more string wrapped around the axle, the axle would turn more times and the car would move further. A thicker string would not snap as easily either.
|
The tension in the string would have been larger and thus there would be more energy for the car to move.
|
Modification made (1 only)
| Car still moved smoothly and thus no modification was required at this point. |
String was thickened and lengthened.
|
Rod was lengthened.
|
MODIFICATION (New Google-sketchup)
 |
3.2 Test Data
1. All relevant measurements of your car (after modification).
Mass of your car
|
314g
|
Mass of each wheel (or one of they are all the same)
|
25g
|
Wheel diameter
|
5.5cm
|
Axle diameter
|
0.2cm
|
Length of string (power stroke)
|
60cm
|
Approx. number of wraps of string
|
35
|
Length of lever extension
|
34.5cm
|
Overall length
|
28cm
|
Overall width
|
20.5cm
|
Overall height
|
7cm
|
2. Data tables showing the results of all 3 trials.
Run Number
|
1
|
2
|
3
|
Total time of Run
| 2s |
2s
|
3s
|
Total distance of Run
|
>2m
|
2m
|
3m
|
Time for lever to fully release
| 2s |
2s
|
3s
|
Distance car travels while lever is releasing
|
>2m
|
2m
|
3m
|
Observations – did car travel smoothly,
straight, always forward, etc?
|
The car travelled smoothly in a straight line.
|
The car travelled smoothly in a straight line.
|
The car travelled smoothly in a straight line.
|
Did lever / string operate smoothly?
| Yes. |
Yes.
|
Yes.
|
3.3 Video Clips
At least 3 best videos are recorded and upload into Youtube.
The 3 links are pasted here and in the blog.
http://www.youtube.com/watch?v=RozjBoQavF8
http://www.youtube.com/watch?v=CU4430Sw4Hg
No comments:
Post a Comment