pearl pendulum_data

Your general comment, if any:

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

The rhythm is faster. It happens so fast it's hard to tell, but after listening to it several times, the pearl hits the bracket faster and faster.

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

The rhythm is further apart. It takes longer for me to hear the pearl hiting the bracket.

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

The pedulum hit the bracket about 8 times. The rhythm was steady. To make it steady I placed it on a flat surface, my computer desk.

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

1. The bracket it parallel to the spine of the book facing towards the bottom of the book, so that the pedulum is not touching the bracket. The sound gets further apart.

2. I have rotated the bracket 45 degrees to the right so that it is facing the bottom right of my textbook. The pendulum is not touching the bracket. It is not as distinctive, but the sound gets further away.

3. The bracket has been turned 45 degrees to the right, counterclockwise and is now parallel to the top of the textbook. The pendulum is touching the bracket. The rhythm is almost steady.

4. The bracket has been turn counterclockwise 45degrees, now facing the top right corner of the textbook. The pendulum is touching the bracket. The sound is faster.

5. The bracket has been turned 45 degrees counter clockwise and the pendulum is touching the bracket. The rhythm is faster.

6. The bracket has been turned 45 degrees counterclockwise, now facing the top left corner of the textbook and the pendulum is touching the bracket. The rhythm is faster.

7. The bracket has been turned 45 degrees counterclockwise, parallel to the bottom of the textbook. The pendulum is touching the bracket. The rhythm is almost steady.

8. The bracket has been turned 45 degrees counterclockwise and the pendulum is not touching the bracket. The rhythm is faster.

9. The bracket is back to its original position.

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

To obtain the most regular beat in this position the bracket is placed parallel to the top and bottom of the textbook.

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

.582

.519

.582

.551

.574

.507

.531

.523

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

.422, .628

.411, .598

.398, .640

.441, .652

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

78mm

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

.418, .629, I never made it to the sixth hit. I wasn't confident enough in my recording on the 6th hit to actually record it.

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

From the release to the first hit, the pendulum is swinging downward to hit the bracket.

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

After the first hit, the pedulum swings back up and down to the second hit. It differs because from the release the pendulum doesn't have to swing upwards.

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:

From the second to the fourth hit the pendulum must swing upwards, downwards, hit, swing upwards, downwards, and hit. Between the release and the second hit the pendulum on swings downward, hits, swings upwards, swings downwards, and hits. The difference is that one swing upwards.

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:

It doesn't only that by that time the pendulum has slowed down from already enduring as many hits as it has.

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

The first time interval is shorter than the subsequent because from the release the pendulum doesn't have to swing up the first time. And, as the pendulum continues to swing it loses velocity or momentum.

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

Subsequent time intervals will increase, because it will take more time for the pendulum to hit.

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

This experiment shows that the length of a pendulum's swing can be changed by factors such as incline and position in relation to incline disproving the hypothesis.