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: **
8,16
8cm
The rubber band is marked with a 1. It is accurate within ±.02
** The basis for your uncertainty estimate: **
It is the accuracy at which I thought I was measuring.
** Positions of the ends of each rubber band, actual lengths of each when the chain supports 1 domino: **
8,16
24.2,31.2
5.7,12.5
20.6,29.0
5.3,12.3
20.5,28.5
8cm,7cm,6.8cm,8.4 cm,7cm,8cm
1,2,3,4,5,6
±.02
** Distances between ends when supporting 2 dominoes **
8.5cm,7cm,6.8cm,8.4cm,7.2cm,8.0cm
Two dominoes
** Lengths when supporting 4, 6, ... dominoes: **
8.8cm,7.0cm,7.3cm,8.5cm,7.5cm,8cm
4
9.0cm,7.3cm,7.5cm,8.7cm,7.8cm,8.2cm
6
9.0cm,7.3cm,7.6cm,9.0cm,8.0cm,8.7cm
8
9.0cm,7.3cm,8.0cm,9.0cm,8.0cm,8.7cm
10
end
** Your table of force in Newtons vs. length in cm for all rubber bands **
8cm,7cm,6.8cm,8.4 cm,7cm,8cm .19 N
8.5cm,7cm,6.8cm,8.4cm,7.2cm,8.0cm .38 N
8.8cm,7.0cm,7.3cm,8.5cm,7.5cm,8cm .76 N
9.0cm,7.3cm,7.5cm,8.7cm,7.8cm,8.2cm 1.14 N
9.0cm,7.3cm,7.6cm,9.0cm,8.0cm,8.7cm 1.52 N
9.0cm,7.3cm,8.0cm,9.0cm,8.0cm,8.7cm 1.9 N
end
** Describe the graph of your first rubber band **
Increasing at an increasing rate throughout
no increase then sudden large increase then no increase
steady increase throughout
steady increase throughout
steady increase throughout
steady increase throughout
** The tension force in your first rubber band at length 9.8 cm: **
do not reach 9.8cm
** The length of your first rubber band when tension is 1.4 N: **
8.84 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: **
1.14 N,1.52 N, does not reach the other lengths
** 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: **
8.4,8.45,8.5,8.7,8.9,9.1
** The typical error you estimate when predicting force for a given length from your graphs: **
Table
±.1N
** The typical error you estimate when predicting length for a given force from your graphs: **
±.1N
** **
1.5hrs
** **
&#Very good work. Let me know if you have questions. &#