Your 'pearl pendulum' 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 general comment, if any:
In my kit there is only one yellow peral with a string attached and another longer piece of string I'm going to hole the string at the top of the bracket with my finger and attemp the experimint. I taped the string to the top of the bracket. I think I had some good results
There should be a small magnet, which can be used to hold the string in place. Finger is OK but gets tiresome, and sometimes you need the extra hand.
Your description of the rhythm of the pendulum when tilted 'back'
THe sounsd get faster or closer together
Your description of the rhythm of the pendulum when tilted 'forward'
The sounds seem to remain constant
Your description of the process used to keep the rhythm steady and the results you observed:
I got the string to where it looked like it was perpendicular to the table and the sound seemeda to be at eaual intervals and when I lilted it forward the interval increased as it slowed down and when it was touching the bracket the interval got faster
eaual
Your description of what happened on the tilted surface (textbook and domino), rotating the system 45 degrees at a time:
position of bracket to start is parellel with the sides of the book and pearl towards the top of the incline I will rotate 45 degrees clockwise each ovservation
rotation interval
1 parellel increased
45 increasrd
90 increased less
135 almost the same
180 slower
225 almoet the same but slower
270 increase a small amount
315 increased
Your description of how you oriented the bracket on the tilted surface to obtain a steady rhythm:
I feel that 135 degrees to the right was the most uniform interval and at 225 was close but it did seem alittle faster
Your report of 8 time intervals between release and the second 'hit':
.342
.310
.400
.330
.369
.451
.349
.521
Your report of 4 trials timing alternate hits starting with the second 'hit':
.410,.591,.480,.460
.571,.611,.561
The length of your pendulum in cm (you might have reported length in mm; the request in your instructions might have been ambiguous):
74cm
Your time intervals for alternate 'hits', starting from release until the pendulum stops swinging:
.39,.59,.48
Your description of the pendulum's motion from release to the 2d hit:
It fall straight towards the bracket
Between release and the second time it 'hits', it does more than just fall straight back toward the bracket. Sometimes it rebounds, sometimes it's moving away from the bracket, etc..
Your description of the pendulum's motion from the 2d hit to 4th hit:
It starts to move to the right
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:
the peral move left and right
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:
more left and right motion
Your conjecture as to why a clear difference occurs in some intervals vs. others:
because it moves straight to the bracket
What evidence is there that subsequent intervals increase, decrease or remain the same:
I sounds like they are staying the same until the very last but I feel there is a small increase.
What evidence is there that the time between 'hits' is independent of the amplitude of the swing?
I see that the angle of the brecket had a large effect on the interval if the pendulum hitting the bracket. I feel by the different interval of the swing and the change in the intervals that there is a difference in how the pendulum swings with the same length.
Very good report. Your description of what happens between 'hits' wasn't detailed enough, but we'll be dealing with that motion as a group in an online discussion. Give a little thought about the details of that motion.
Your timing data were excellent, good enough to shed some light on that motion. This is uncommon--takes a good observer to get data that good.