• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Question: Does the length of the string holding the pendulum in mid-air affect the frequency?

Extracts from this document...

Introduction

Factors that Affect the Frequency of a Pendulum

Friday, February 8th, 2011

Written By: Moiz Zahid

Performed with: Samer Hafuth and Milos Jovkovic

Question: Does the length of the string holding the pendulum in mid-air affect the frequency?

Hypothesis: If the length of the string is increased then the frequency of the pendulum will decrease.

Explanation: When the length of the string is increased, the frequency decreases as it takes more time for the pendulum to complete one cycle. The more time it takes the slower the movement meaning the lower the frequency. Since frequency equals number of cycles divided by total time, the larger the time amount the more the cycles are divided by, which would result in a smaller number. This is similar to water waves as the larger the wave the slower it moves and the lower its frequency.

Figure 1: Graph Sketch Variables:

Middle

Repeat steps 3-9 for 30, 40 and 50cm string length (from C-Clamp to bottom of string loop), 4 times each, and 3 more times for 20cm length to get 4 trials for each length.

Observations:Table 1: Comparing String Length with Time

 Trial String Length (cm)±0.01 Time (seconds)±0.5 1 20 16.1 2 15.9 3 15.8 4 15.8 5 30 18.6 6 18.2 7 18.6 8 18.4 9 40 20.5 10 20.6 11 20.6 12 20.6 13 50 22.2 14 22.2 15 22.4 16 22.3

*Retort Stand wobbled throughout the experiment

Analysis:

Sample Calculation: Conclusion

Second Source of Error is the pendulum clamp interference with string while it moves. Since the String is looped around the pendulum clamp holder, and swings perpendicular to the clamp, the clamp interferes with the movement of the string. As the string swings it hits the clamp near the rest position which causes the string to slow down in its movement. When the string slows down the time increases which causes inaccurate frequency measurement and inaccurate timing. This factor could be fixed by having a clamp where the string hangs below it and swings below it, so that there is no interference in the movement of the string.

This student written piece of work is one of many that can be found in our International Baccalaureate Physics section.

## Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Related International Baccalaureate Physics essays

1. ## Pendulum lab. The main purpose for this experiment is to find the factor that ...

In the calculation, the percentage of uncertainty from the gradient of best-fit line was 2%. One factor that affected the motion of the pendulum was the length of the string as it is the independent variable in this experiment, as table shows an increase in time whenever there is an increase in the length of the string.

2. ## Simple pendulum lab. In this experiment, the length of the string will be ...

As it can be seen from the data table and the graph that the value for gravity was calculated to be 8.56 ms-2 � 1 ms-2. Furthermore, the percent error was calculated to be 12.7 %. In my experiment, the one factor that affected the motion of the simple pendulum was length of the string.

1. ## Investigate the factors affecting the period of a double string pendulum

This will make the results roughly more accurate. (5) * Finally, as for the height and positioning of the two clamp stands, I will use a height of 50cm and ensure that the two clamp stands are parallel and touching one another on their bases.

2. ## Speed of Sound in Air

� 0.5 Period (s � 0.005s) Average Wavelength (m) 256 0.00391 1.351 320 0.00313 1.064 384 0.00260 0.872 440 0.00227 0.766 512 0.00195 0.663 A graph of average wavelength vs. the period will be provided. Note: Uncertainties are too small to be seen and thus are excluded from the graph but however, must be taken into consideration.

1. ## Speed of Sound in Air

A frequency which is more accurate i.e. one generated electronically, would also result in more valid results. The apparatus that were used performed well, although the tuning fork may have contributed to errors, as stated above.

2. ## Investigating the Oscillations of an Obstructed Pendulum

clamp shook and moved while the bob was oscillating, and this meant that the clamp sometimes went out of position, at an angle. This would have had a major effect on the results, and would have affected the validity of the data that was obtained during the investigation.

1. ## HL Physics Revision Notes

This lens is called an achromatic doublet, the two types of glass produce equal but opposite dispersion State the conditions necessary to observe interference between two sources they must have the same phase the phase difference between them must remain constant Explain, by means of the principle of superposition, the

2. ## How does the sinkage depth of a tyre affect its rolling resistance ?

Arriving at the final conclusion for the rolling resistance based on the sole evidence of the sinkage depth on behalf of the air pressure of the tire. We can state that in order to determine the best possible value for the least resistance we would have to arrive at the • Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to 