Phy 201
Your 'rubber band calibration' report 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: **
10, 20.3
10.3
I held the single reduced ruler up while the rubber band chain hung next to it. I think its accurate within .05.
** #$&* The basis for your uncertainty estimate: **
The single reduced ruler is fairly accurate to see the millimeter markings so I can easily tell to within .05 cm
** #$&* Positions of the ends of each rubber band, actual lengths of each when the chain supports 1 domino: **
10, 20.3
10, 22.3
10, 20.6
10, 22.3
10, 20.45
10, 21.8
end
10.3, 12.3, 10.6, 12.3, 10.45, 11.8
uncertainty is still .05
** #$&* Distances between ends when supporting 2 dominoes **
10.7, 12.3, 11.0, 12.4, 11.0, 12.0
2 dominoes were added for these measurements
** #$&* Lengths when supporting 4, 6, ... dominoes: **
12.1, 12.8, 12.4, 12.7, 12.0, 12.4
4
14.1, 13.1, 14.8, 13.1, 13.9, 12.8
6
end
** #$&* Your table of force in Newtons vs. length in cm for all rubber bands **
10.3, 12.3, 10.6, 12.3, 10.45, 11.8, .19
10.7, 12.3, 11.0, 12.4, 11.0, 12.0, .38
12.1, 12.8, 12.4, 12.7, 12.0, 12.4, .76
14.1, 13.1, 14.8, 13.1, 13.9, 12.8, 1.14
end
each column represents how each of the six rubber bands change in lengths with the addition of dominoes.
** #$&* Describe the graph of your first rubber band **
As the newtons increased, so did the lengths of the rubber bands. Increasing at an increasing rate. the shapes of the curves are pretty consistent with each other.
end
** #$&* The tension force in your first rubber band at length 9.8 cm: **
.18N
** #$&* The length of your first rubber band when tension is 1.4 N: **
11.2
** #$&* The forces at your observed lengths the 1st rubber band, as given by the curve, and the deviations of those curve-predicted lengths from the observed lengths: **
.19, .38, .76, 1.14
It appears to differ by the amount of weight by 2x, 4x, and 6x respectivley
** #$&* 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: **
10.3, 10.7, 12.1, 14.1
the differences were consistent with the measurements
** #$&* The typical error you estimate when predicting force for a given length from your graphs: **
tables because they are precise and the curve is estimated.
.5 N because the graph i made went in steps of .5
** #$&* The typical error you estimate when predicting length for a given force from your graphs: **
.05cm because I can easily tell measurements on the ruler up to there
** **
5 hours
** **
&#This looks very good. Let me know if you have any questions. &#