3.1 Trial
Test and Design Modification
Run Number
|
Run 1
|
Rerun 1
|
Rerun 2
|
Total time of Run
|
2 sec
|
4 sec
|
5 sec
|
Total distance of Run
|
0.5m
|
4m
|
5.4m
|
Time for lever to fully release
|
1 sec
|
3 sec
|
2 sec
|
Distance car travels while lever is releasing
|
0.1m
|
1.7 m
|
2m
|
Observations – did car travel smoothly, straight, always forward, etc?
|
- Went straight, but curved towards the right after a while
|
Went straight, but curved towards the right after a while
|
Went straight, but curved towards the right after a while
|
Did lever / string operate smoothly?
|
Yes
|
Yes
|
Yes
|
Filename of video recorded is:
|
BI1
|
BI2
|
BI3
|
Area for improvement (1 only)
|
Back wheels rotate on the spot
|
Back wheels drifted slightly when mousetrap is released
|
Lever seems to be release too quickly
|
Possible reason (1 only)
|
Mousetrap arm pulled all the way back (too much power, wheels spin on the spot)
|
No traction between back wheels and floor
|
Coils around back axle were not tight enough
|
Modification made (1 only)
|
Reduce the angle of the mousetrap arm when lifted
|
Wrap rubber around the circumference of the wheel
|
Loop the twine parallel to one another, with no spaces in between
|
MODIFICATION (New Google-sketchup)
1. All relevant measurements of your car (after modification).
Mass of car
|
320.2g
|
Mass of each wheel
|
Front wheel: 35.33g
Back wheel: 49.33g
|
Wheel diameter
|
Front wheel: 4.2cm
Back wheel: 12cm
|
Axle diameter
|
0.5cm
|
Length of string (power stroke)
|
44.6cm
|
Approx. number of wraps of string
|
10
|
Length of lever extension
|
Not Applicable
|
Overall length
|
37.5cm
|
Overall width
|
30.5cm
|
Overall height
|
12.2cm
|
2. Data tables showing the results of all 3 trials.
Run Number
|
1
|
2
|
3
|
Total time of Run
|
5 sec
|
6 sec
|
6 sec
|
Total distance of Run
|
6.7m
|
6m
|
5.8m
|
Time for lever to fully release
|
3 sec
|
3 sec
|
3 sec
|
Distance car travels while lever is releasing
|
2.05m
|
2.2m
|
2.3m
|
Observations – did car travel smoothly, straight, always forward, etc?
|
Went straight, but curved towards the right after a while
|
Went straight, but curved towards the right after a while
|
Went straight, but curved towards the right after a while
|
Did lever / string operate smoothly?
|
Yes
|
Yes
|
Yes
|
Filename of video recorded is:
|
AI1
|
AI2
|
AI3
|
3.3 Video Clips
At least 3 best videos are recorded and uploaded into Youtube.
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