Whoever submitted this didn't include email or name. When this happens the program defaults to the last access code submitted. So if this isn't yours, please let me know.
** Your general comment, if any: **
** Your description of the rhythm of the pendulum when tilted 'back' **
It sounds are deffinetly getting closer together when the bracket is tilted back. Near the end the last coulple of sounds come almost one after the other.
** Your description of the rhythm of the pendulum when tilted 'forward' **
The sounds get further and further apart at the end of the swing it stops hitting the bracket even though the pendilum is still moving.
** Your description of the process used to keep the rhythm steady and the results you observed: **
I used envelopes I have on my dest to make the pendilum level. When i released it the sound seemed to stay at the same interval even though it got lower and lower in sound. I counted 14 hits before I couldn't hear it any more this is at realesing the pendilum from about 45 degrees from the bracket.
** Your description of what happened on the tilted surface (textbook and domino), rotating the system 45 degrees at a time: **
When I started the experiment I had created a reasonable flat surface. A glass marble wouldn't roll off the book. I started the experiment with the pearl facing me.It was not touching the backet the beats seemed to get furhter and futher apart.
I rotated the brakcet 45 deg clock wise and realease againe. The pearl was leaning toward my right (facing it) and not touching the bracke. Againe the beats seemed to get futher apart.
I then rotated another 45 deg clockwise. The pearl semed to be hanging flush with the bracket but skewed to one side just a little. When I released the pearl the beats seemed to stay the same.
I rotated another 45 deg clock wise. This time the pearl was siting on the bracke just barely but and haging to right if you looked over the top of it. When released the beats seemed to get closer and closer together.
Rotating another 45 deg (180 deg from the starting point). The pearl is deffinetly laying against the brakcet in the center. The beats deffinetly got closer together.
Rotating another 45 deg clockwise. The pearl is still laying against the bracke hanging a little to the right if you look over the top. The beats got closer together but not as quick as in the previous set up. Rotating another 45 deg clockwise the pearl seems to be sitting in the correct position but a little closer to me. The beats seemed to stay the same.
Rotating another 45 deg the pearl agine is hanging way form the bracket and to the left if you are facing it. As expected the beats got further and furter apart.
** Your description of how you oriented the bracket on the tilted surface to obtain a steady rhythm: **
On the platform I would turn the pendilum so that it is running perpendiculer to the spine. This seemed to give the most even beat.
** Your report of 8 time intervals between release and the second 'hit': **
0.563 sec
0.578 sec
0.547 sec
0.516 sec
0.531 sec
0.547 sec
0.563 sec
0.468 sec
These times are the approximate amount of time it took for the pear to be release and strike the brakcet the 2 times.
** Your report of 4 trials timing alternate hits starting with the second 'hit': **
0.594, 0.547, 0.656
0.625, 0.625, 0.641
0.594, 0.672, 0.656
0.578, 0.578, 0.625
These were the times it took for every other hit of the pearl agains the bracket from releas.
The numbers show a lot of diffence this is more than likly due to the reactiontime between human and timer device.
** The length of your pendulum in cm (you might have reported length in mm; the request in your instructions might have been ambiguous): **
80.7 mm
** Your time intervals for alternate 'hits', starting from release until the pendulum stops swinging: **
0.598, 0.606, 0.645
** Your description of the pendulum's motion from release to the 2d hit: **
The penkilum moves from the first extreme point (point of release) to the point where it makes contact with the bracket. Close to its equilibrium point.
** Your description of the pendulum's motion from the 2d hit to 4th hit: **
From the point of hit the pedilum travels back toward the extreme point then it stops and moves back to ward its equiliibrium to hit the bracket againe.
** Your description of the difference in the pendulum's motion from release to the 2d 'hit', compared to the motion from the 2d 'hit' to the 4th hit: **
Between the release and the second hit the pedilum will travel over it path 3 times. Down-hit, back up-stop and down-hit agine.
Between the 2 and 4th hits the pedilum travels its path 4 times.
Up-stop,down-hit(#3), up-stop and down-hit (#4).
** Your description of the difference in the pendulum's motion from the 2d to the 4th 'hit' compared to the motion from the 4th to 6th hit: **
The motion between the second and forth hit should be the same as betwen the forth and the sixth. Except that part of the force of the pendilum has been lost.
** Your conjecture as to why a clear difference occurs in some intervals vs. others: **
Because it only has 3/4 of the movement of the pendilum as explained earlier.
** What evidence is there that subsequent intervals increase, decrease or remain the same: **
They will more than likly decrease due to the loss of force of the pendilum during each of tis swings.
** What evidence is there that the time between 'hits' is independent of the amplitude of the swing? **
I don't believe that this experiment gives any information to refernce a change in the length of the pendilum, because we didn't change the length of the pendilum and try the experiment againe.
The amplitude is not the length of the pendulum, but the distance from the extreme point to the equilibrium point. This distance is clearly decreasing; if the rhythm remains constant as amplitude progressively decreases, then there is good confirmation that the time between 'hits' is independend of amplitude.
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2.5 Hours
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&#Very good work. Let me know if you have questions. &#