pearl pendulum_data

Your general comment, if any:

I am so confused!!!!!!!!!!!!

Your description of the rhythm of the pendulum when tilted 'back'

When the bracket is sitting straight (not tilted) the pearl makes a lighter, more vibrating sound. The rhythm seems to be farther apart. When the bracket is tilted the pearl makes a harder, more constant sound.

Your description of the rhythm of the pendulum when tilted 'forward'

The sounds get farther apart, the pearl strikes the bracket less frequent, and slower than before.

Your description of the process used to keep the rhythm steady and the results you observed:

The surface I used was pretty level, the pearl barely touched the bracket when I set it up. When I swung the pearl and released it, it struck pretty steadily. When I held the pearl and released it, it struck the bracket 15 times before it came to a complete rest.

Your description of what happened on the tilted surface, rotating the system 45 degrees at a time:

When the bracket is in the first position parallel to the sides of the book the pearl makes sounds that are closer together when release.

When the bracket is turned counterclockwise 45 degrees the pearl strikes the bracket and the sounds are further apart.

When turned counterclockwise another 45 degrees the pearl strikes the bracket and the sounds seem closer together.

When turned another 45 degrees and the pearl strikes the bracket the sounds again seem further apart.

Your description of how you oriented the bracket on the tilted surface to obtain a steady rhythm:

The bracket in its original position seems to have the most regular sounds when it strikes against the bracket.

Your report of 8 time intervals between release and the second 'hit':

1 198.375 198.375

2 198.6719 .296875

3 206.0156 7.34375

4 206.3438 .328125

5 212.9375 6.59375

6 213.2813 .34375

7 228.5156 15.23438

8 228.8906 .375

9 239.6875 10.79688

10 240.0938 .40625

11 248.0625 7.96875

12 248.5625 .5

13 256.25 7.6875

14 256.5938 .34375

15 264.4531 7.859375

16 264.7813 .328125

Your report of 4 trials timing alternate hits starting with the second 'hit':

.515, .5, .453, .562, .546

The length of your pendulum in cm (you might have reported length in mm; the request in your instructions might have been ambiguous):

7cm.

Your time intervals for alternate 'hits', starting from release until the pendulum stops swinging:

.15, .047, .109

Your description of the pendulum's motion from release to the 2d hit:

The pearl was swinging in a straight downward motion.

Your description of the pendulum's motion from the 2d hit to 4th hit:

The pearl was swinging upward again, after the first hit and swinging downward a little bit slower before hittingt he bracket again.

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 motion between release and the second hit is moving in a little faster, constant motion that the motion between the second hit and the fouth because the pearl is slowing down between the second and the fourth hit.

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 fourth hit is still a little faster than the motion between the fouth and sixth.

Your conjecture as to why a clear difference occurs in some intervals vs. others:

Because the pearl is striking faster the first time than the other times.

What evidence is there that subsequent intervals increase, decrease or remain the same:

They would decrease because the pearl motions slower throughout.

What evidence is there that the time between 'hits' is independent of the amplitude of the swing?

The lenght of the pearl swing would depend on the lenght of the string. The shorter the string the pearl wouldn't have to travel as far and the longer the string the pearl would swing farther and therefore the time between the hits would be farther apart. 13:04:00 01-29-2006