phy121
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, 17.61 7.61
I just subtracted the first number from the second to get the length. I marked the rubber band with dots on the flat side.
I'd say they were +-.02cm.
** The basis for your uncertainty estimate: **
Due to my instability in holding the ruler and estimation of location on the ruler.
** Positions of the ends of each rubber band, actual lengths of each when the chain supports 1 domino: **
10, 17.61 10, 17.6 10, 17.75 10, 17.15 10, 17.2 10, 17.3
END
7.61, 7.6, 7.75, 7.15, 7.2, 7.3
., .., ..., ...., ....., ......
+-.02cm
** Distances between ends when supporting 2 dominoes **
7.75, 7.7, 7.9, 7.78, 7.88, 7.93
They were greater than the single domino
** Lengths when supporting 4, 6, ... dominoes: **
8, 7.9, 7.6, 7.5, 7.6, 7.77
4
8.25, 8.1, 7.75, 7.7, 7.8, 7.9
6
8.5, 8.3, 8, 7.95, 7.97, 8.15
8
8.85, 8.55, 8.2, 8.15, 8.12, 8.3
10
** Your table of force in Newtons vs. length in cm for all rubber bands **
7.61, 7.6, 7.75, 7.15, 7.2, 7.3
.19
7.75, 7.7, 7.9, 7.78, 7.88, 7.93
.39
8, 7.9, 7.6, 7.5, 7.6, 7.77
.76
8.25, 8.1, 7.75, 7.7, 7.8, 7.9
1.14
8.5, 8.3, 8, 7.95, 7.97, 8.15
1.52
8.85, 8.55, 8.2, 8.15, 8.12, 8.3
1.9
END
*&*$*&$
Each line in comma delimited format is the measuremtents (in cm) of the length of each rubberband (1-6 left to right) with the weight applied to them under each line
** Describe the graph of your first rubber band **
It is increasing at an increasing rate, and rather straight compared to the examples. end They are all pulled rather taught ** taut **
, and swollen slightly where they are attached to the paperclip-hooks.
** The tension force in your first rubber band at length 9.8 cm: **
3.6N
** The length of your first rubber band when tension is 1.4 N: **
8.4cm
** 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: **
.16, .38, .77, 1.16, 1.56, 2.11
.03, 0, .01, .02, .04, .21
** 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: **
7.63, 7.75, 7.88, 8.23, 8.48, 8.72
.02, 0, .12, .02, .02, .13
** The typical error you estimate when predicting force for a given length from your graphs: **
The curve. Its more linear.
+- .2N
** The typical error you estimate when predicting length for a given force from your graphs: **
+- .1cm
** **
2.5
** **
&#Your work looks very good. Let me know if you have any questions. &#