After the prompt on the first line below the 'Your Answer' prompt, report your vccs email address, the length of the shortest pendulum in centimeters, the
number of cycles counted for this pendulum in 60 seconds, and the time required for one complete cycle. Put a comma between each pair of entries. So for
the example of the 91-inch-tall student, the first line would read
abc123@email.vccs.edu, 12, 85, .7
Each subsequent line will appear in the same format. So the next two lines for this example student would be
abc123@email.vccs.edu, 15, 75, .8
abc123@email.vccs.edu, 24, 60, 1
It should take you only a couple of minutes to enter this information. You should as usual use copy-and-paste to insert your email address (this will save
you time and will ensure that you have given the correct address).
Lines have been provided for up to 8 lengths; however if you followed the instructions you should have observed pendulums of only 6 or 7 different lengths.
Extra lines can be left blank.
Your answer (start in the next line):
7, 115, .5
11, 91, .66
14, 84, .7
22, 62, 97
28, 54, 1.1
45, 45, 1.3
56, 41, 1.46
77, 34, 1.76
112, 28, 2.1
your brief discussion/description/explanation:
************`
#$&*
1. According to your graphs, complete the following tables
Enter the numbers from your table in the space below with one line for each length. Each line should contain the length, number of cycles and time for one
cycle, separated by tabs.
Your answer (start in the next line):
Length in cm Number of Cycles Time for one cycle
7 115 .5
11 91 .66
14 84 .7
22 62 .97
28 54 1.1
45 45 1.3
56 41 1.46
77 34 1.76
112 28 2.1
#$&* length, count, period for given lengths
length in cm
number of cycles
time for one cycle
10
30
50
70
90
Enter the numbers from your table in the space below with one line for each length. Each line should contain the length, number of cycles and time for one
cycle, separated by tabs.
Your answer (start in the next line):
Length in cm Number of Cycles Time for one cycle
7 115 .5
11 91 .66
14 84 .7
22 62 .97
28 54 1.1
45 45 1.3
56 41 1.46
77 34 1.76
112 28 2.1
#$&* length, count, period for given counts
@&
The question asked for estimates based on your graph, for pendulum lengths 10, 30, 50, 70, 90, 110 and 130 cm.
You appear to have given your original data in this table. It's a good table, but it doesn't answer the question.
*@
length in cm
number of cycles
time for one cycle
0.5
0.9
1.3
1.7
2.1
2.5
Enter the numbers from your table in the space below with one line for each length. Each line should contain the length, number of cycles and time for one
cycle, separated by tabs.
Your answer (start in the next line):
Length in cm Number of Cycles Time for one cycle
7 115 .5
11 91 .66
14 84 .7
22 62 .97
28 54 1.1
45 45 1.3
56 41 1.46
77 34 1.76
112 28 2.1
#$&* length, count, period for given periods
@&
The question asked for estimates based on your graph, for cycles lasting .5, .9, 1.3, 1.7, 2.1 and 2.5 seconds.
You appear to have given your original data in this table.
*@
2. Is the graph of # of cycles vs. length in cm constant, increasing or decreasing? Is it doing so at an increasing, constant or decreasing rate?
On this and on all questions, insert your answer after the 'Answer:' prompt, and include a brief explanation of how you arrived at your answer.
Your answer (start in the next line):
The graph in this is decreasing.
Each time the length of the thread is increased the number of cycles decreases. In the graph the Y values are the # of cycles while the X values is the
length of the thread and after connecting the dots the
graph is decreasing.
#$&* graph of count vs length
3. Is the graph of time required for one cycle vs. length in cm constant, increasing or decreasing? Is it doing so at an increasing, constant or decreasing
rate?
Your answer (start in the next line):
The graph in this one is increasing.
It is doing it at a decreasing rate.
#$&* graph of period vs length
4. How much difference is there between your first two lengths, and how much difference between the number of cycles counted in 60 seconds?
Your answer (start in the next line):
There is a 4 cm difference between the first two lengths and there is a 23 difference in the number of cycles in 60 seconds.
#$&* diff between lengths, between counts
5. How much difference is there between your first two lengths, and how much difference between the corresponding times required to complete a cycle?
Your answer (start in the next line):
There is a 4 cm difference between the first two lengths and there is a .16 difference in time for one cycle to complete.
#$&* diff between lengths, periods
6. How much difference is there between your last two lengths, and how much difference between the number of cycles counted in 60 seconds?
Your answer (start in the next line):
There is a 35 cm difference from the last two lengths and there is a 6 difference in the number of cycles in 60 seconds.
#$&* diff between last two lengths, counts
7. How much difference is there between your last two lengths, and how much difference between the corresponding times required to complete a cycle?
Your answer (start in the next line):
There is a difference of 35 cm between the last two lengths and there is a .34 difference required for a cycle to be complete.
#$&* diff between last two lengths, periods
8. Is your graph of number of cycles counted vs. length in cm steeper, on the average, between the first two lengths or between the last two lengths?
Your answer (start in the next line):
It is steeper between the first two lengths than it is between the last two lengths.
#$&* count vs. length steeper between 1st two or last two pts
9. Is your graph of time required to complete a cycle vs. length in cm steeper, on the average, between the first two lengths or between the last two
lengths?
Your answer (start in the next line):
It is steeper between the first two lengths than it is between the last two lengths.
#$&* period vs. length steeper between 1st two or last two pts
10. The curve you sketched for your graph of (time required to complete a cycle) vs. (length) cannot possibly pass through the center of each of your
points.
What is the greatest vertical distance between a point of your graph and the curve?
What do you think is the least vertical distance?
You will answer these questions at the 'your answer' prompt a little ways below.
(For example, in the figure below a curve has been constructed based on three data points.
The first and third data point lie slightly above the curve, the second point slightly below.
The second point is probably the one which lies furthest from the curve, at a distance of approximately .03 vertical units below.
This distance is roughly estimated based on the scale of the graph. The first point is perhaps .01 vertical units above the curve, and the third is perhaps
.02 units above.)
Your answer (start in the next line):
The one with the greatest vertical distance is point that hsa a length of 22 cm which i think is approximately .09 vertical distance above the curve.
The one with the least is the one that has a length of 45 which has an approximate .01.
#$&* greatest, least vert dist between datapt and curve
After the 'Your Answer' prompt below, insert your answers to the following :
Describe how you constructed your pendulum and out of what (what you used for the mass, its approximate dimensions, what it is made of, what sort of string
or thread you used--be as specific as possible).
Describe its motion, including an estimate (you don't have to measure this, just give a ballpark estimate) of how far it swung from side to side and how this
distance varied over the time you counted.
Describe what you mean by a 'cycle'. Different people might mean different things, but there are only a couple of reasonable meanings. As long as you
describe what you mean we will all understand what you measured.
'Frequency' means the number of cycles in a unit of time. Your counts are frequencies, in cycles/minute. 'Period' means time required for a cycle. Explain
how you used your observed frequencies to obtain the periods of the nine pendulums in this experiment.
Your answer (start in the next line):
I constructed my pendulum with a thread that has a thickness of 6 mm and is made out of 100 % acrylic. I used a small washer that has aa approximate 1.9 cm
diameter (also metal)
The motion of the pendulum would at the beginning swing from side to side at a constant rythym then it would slowly become slower. It didn't swing in a
different direction. I believe the approximate length of the 7 cm thread would swing from side to side by about 5 cm. After a couple of seconds the distance
that it swung would slowly come to a halt.
A cycle for me would be when the pendulum would start at the right when it is swinging.. let's say this is the pendulum...
|------|------| (The - represents the pendulum that it is swinging)
<-------------> One cycle would be when it reaches the right twice
One Cycle
The way I observed the frequencies was when the pendulum begun I would start counting it when the pendulum reached the right for the second time then I would
start counting 1, 2, 3... so on. I would also try to set it as best as I could to when I began the swinging (because it would go slower after a couple of
seconds). So then the period would be taking the amount of seconds (which were 60) divided by the number of cycles in the one minute.
#$&* explanations with std terminology
*#&!
@&
Very good, except that two of the tables you were asked to give don't match the questions. I've inserted notes to clarify.
&#Please see my notes and submit a copy of this document with revisions, comments and/or questions, and mark your insertions with &&&& (please mark each insertion at the beginning and at the end).
Be sure to include the entire document, including my notes. &#
*@