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: **
15.4
I measured from end to end of the rubber bands starting at 0 cm so i do not have a first line. I believe the actual measurement is +.03.
** #$&* The basis for your uncertainty estimate: **
I think because of the loop in the rubber band and the slight movement if it is touched the uncertainty is greater than .03.
** #$&* Positions of the ends of each rubber band, actual lengths of each when the chain supports 1 domino: **
16
END
15.5
END
15.7
END
15.4
END
I think the uncertainty is +.03
** #$&* Distances between ends when supporting 2 dominoes **
15.7
END
16.1
END
15.5
END
16.0
END
15.7
END
** #$&* Lengths when supporting 4, 6, ... dominoes: **
15.9, 16.4, 16.0, 16.2, 15.9
4
16.0, 16.6, 16.1, 16.4, 16.2
6
16.5, 16.7, 16.6, 16.8, 16.5
8
END
** #$&* Your table of force in Newtons vs. length in cm for all rubber bands **
15.4, 16.0, 15.5, 15.7, 15.4 .19
1
15.7, 16.1, 15.5, 16.0, 15.7 .38
2
15.9, 16.4, 16.0, 16.2, 15.9 .76
4
16.0, 16.6, 16.1, 16.4, 16.2 1.14
6
16.5, 16.7, 16.6, 16.8, 16.5 1.52
8
END
** #$&* Describe the graph of your first rubber band **
My graph seemed to be pretty consistent across all 6 rubber bands being that it was increasing at a fairly increasing rate. My length started at 14cm and went through 17cm in increments of .5 and my force started at .25 and went to 1.5 in increments of .25.
** #$&* The tension force in your first rubber band at length 9.8 cm: **
1.8N
** #$&* The length of your first rubber band when tension is 1.4 N: **
9.2cm
** #$&* The forces at your observed lengths the 1st rubber band, as given by the curve, and the deviations of those curve-predicted lengths from the observed lengths: **
unsure of what this is asking. The values I observed on not listen on the above graph.
** #$&* 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: **
15.4, 15.7, 16.0, 16.1, 16.4
Most of these are exact of within .1 of the observed.
** #$&* The typical error you estimate when predicting force for a given length from your graphs: **
I have more faith in the values reported in the table because they are to the best of my ability the exact values. +-.2. That is about how far some of my points lie form the line.
** #$&* The typical error you estimate when predicting length for a given force from your graphs: **
.1. This is about hwo far some of my points lie from the line as well.
** **
1.5 hours
** **
&#Very good work. Let me know if you have questions. &#