pearl pendulum

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' **

Sounds get closer and the rhythm gets faster when the bracket is tilted back

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

when tilted forwards,the sounds become further apart,rhythm gets slower,pearl strikes less and less frequently with each bounce.

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

i used a note book to get the pearl barely touch the bracket.I couldn't get the steady rhythm.

** Your description of what happened on the tilted surface (textbook and domino), rotating the system 45 degrees at a time: **

I took the Textbook and kept two domnos, on eon each side of the book(vertically).Then i placed the pendulum bracket on the book with the base parallel to the opposite side(horizontal) of the dominos.

pendulum released-the sound was loud and the frequency was getting less.

Rotated 45 degree-less freuency compared to earlier and the sound was less..

Rotated 45degrees-frequency was less than 1st but more than 2nd

Rotated 45somewhat similar to 3rd one

Rotated 45 degrees=-somewhat similar to 1st one

Rotated 45degrees-loudest noise and higher frequency.

Rotated 45 degrees- less frequency

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

Perpendicular to the dominos,but pendulum facing the dominos side

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

1 117.8906 117.8906

2 118.5156 .625

3 118.7969 .28125

4 119.0781 .28125

5 119.2969 .21875

6 119.6094 .3125

7 119.8125 .203125

8 120.0625 .25

The numbers were obtained by cliking on the click to time event at the same time as the pendulum was released and then i did my best to clik with the times i heard the second and the remaining times the pearl hit the bracket.

My pendulum stopped at 10th clik.

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

.328,.265,.234,.25,.29,.31,.29,.37,.17,.31

the results to me mean that the time gap between each time pearl hits the bracket is widening.

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

9cm

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

.32,.094,.056

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

2

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

4

** 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: **

6

** 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: **

8

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

less no of extreme to equilibrium point intervals

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

increase and then stay the same

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

Not very sure,but i think it only depends on the length of the pendulum.None of the time intervals had any thing to do with how far it actually swings.

** **

1 hour 30 minutes

** **

&#Good work. Let me know if you have questions. &#

*&$*&$

*&$*&$..