PHY 201
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: **
** Your description of the rhythm of the pendulum when tilted 'back' **
closer together, rhythm seemed a little more constant.
** Your description of the rhythm of the pendulum when tilted 'forward' **
seemed much more constant
** Your description of the process used to keep the rhythm steady and the results you observed: **
Tilted it so the pearl was just touching the bracket. It struck 12 times.
** Your description of what happened on the tilted surface (textbook and domino), rotating the system 45 degrees at a time: **
The sounds get closer together up to 180d the progressively get further apart until you reach the beginning.
** Your description of how you oriented the bracket on the tilted surface to obtain a steady rhythm: **
So that the end was tilted just enough to make the pearl just touch the mechanism.
** Your report of 8 time intervals between release and the second 'hit': **
.327
.365
.331
.356
.374
.395
.384
.301
The interval was pretty constant. Any deviation can be attributed to timer operator error.
** Your report of 4 trials timing alternate hits starting with the second 'hit': **
.89,.91,.95,.88
.99,.95,.89,.77
1.11,.98,.95,.91,.99
The interval was pretty constant. Any deviation can be attributed to timer operator error.
** The length of your pendulum in cm (you might have reported length in mm; the request in your instructions might have been ambiguous): **
3.5 inches
** Your time intervals for alternate 'hits', starting from release until the pendulum stops swinging: **
.99,.95.93
** Your description of the pendulum's motion from release to the 2d hit: **
0
** Your description of the pendulum's motion from the 2d hit to 4th hit: **
0
** 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: **
1
** 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: **
1
** Your conjecture as to why a clear difference occurs in some intervals vs. others: **
** What evidence is there that subsequent intervals increase, decrease or remain the same: **
Should decrease because the rebound is getting shorter due to friction, and the rebound between the pearl material and the metal.
** What evidence is there that the time between 'hits' is independent of the amplitude of the swing? **
** **
1 hr
** **
You don't appear to have answered all the questions in the second half of the document. Please insert your answers, if you haven't already submitted them, into a copy of this document and submit.