Your work on rubber band calibration has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
Your initial comment (if any):
first line ruler markings, distance in actual cm between ends, how obtained:
0,8.60
8.60
I measured from the appex of the top of the rubber band to the appex of the bottom of the rubber band. The rubber band is marked with a single line indicating the number 1 band. My measurement is accurate to +/-.05cm.
The basis for your uncertainty estimate:
M estimate of uncertainty of the length of the first rubber band is .05 cm. The ruller is marked onl to the mm.
Positions of the ends of each rubber band, actual lengths of each when the chain supports 1 domino:
0, 8.6
end
8.6, 15.01
end
15.01, 30.09
end
30.09, 46.90
end
46.90, 63.63
end
Distances between ends when supporting 2 dominoes
8.85, 8.95, 9.05, 8.75, 9.01
Lengths when supporting 4, 6, ... dominoes:
9.15, 9.35, 9.35, 9.25, 9.55
4
9.55, 9.61, 9.85, 9.45, 9.85
6
10.15, 10.05, 10.35, 9.85, 10.45
8
end
Your table of force in Newtons vs. length in cm for all rubber bands
8.6, 8.79, 8.85, 8.62, 8.82, .19n
8.85, 8.95,8.05, 8.75, 9.01, .38n
9.15, 9.35, 9.35, 9.25, 9.55, .76n
9.55, 9.61, 9.85, 9.45, 9.85, 1.14n
10.15, 10.05, 10.35, 9.85, 10.45, 1.52n
end
Describe the graph of your first rubber band
The graph for the rubber bands cure in an increasing direction. The graph increase at an increasing rate throughout.
The tension force in your first rubber band at length 9.8 cm:
1.51 Newtons
The length of your first rubber band when tension is 1.4 N:
9.65 cm
The forces at your observed lengths the 1st rubber band, as given by the curve, and the deviations of those curve-predicted lengths from the observed lengths:
.24, .38, .80, 1.25, 1.56
.05, 0.0, .04, .11, .04
The lengths predicted for forces .19 N, .38 N, .76 N, 1.14 N, etc. by the curve for your first rubber band; the deviations of your actual observations from these predictions:
8.55, 8.85, 9.12, 9.44, 10.10
-0.05, 0, -.03, -.11, -.05
The typical error you estimate when predicting force for a given length from your graphs:
The amount of uncertainty would be +/- .048n. This is the average force of the estimate/value forces for the lengths.
The typical error you estimate when predicting length for a given force from your graphs:
-.24cm This is the average length of the differences of the values length/estimate length.
Your report has been received. We will be discussing this work as a group, after the due date.