• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4
5. 5
5
6. 6
6
7. 7
7

# Pendulum investigation

Extracts from this document...

Introduction

Pendulum investigation

Plan

Aim

To investigate how the length of a simple pendulum will affect the time for a full swing.

Variables

Length

The length of the pendulum has a large effect on the time for a complete swing. As the pendulum gets longer the time increases. As the pendulum gets shorter the time decreases.

Air resistance

A big and light pendulum bobble would be affected by a major amount of air resistance. This might cause the pendulum to move in a different way.

With a little pendulum bobble there is very small air resistance. This can easily be observed because it takes an extended time for the pendulum to stop swinging, so only a small amount of energy is lost on each swing.

Gravity

The pendulum is motivated by the force of gravity acting on it.

The more gravity the shorter time it will take for a complete swing.

The less gravity the longer it would take for a complete swing

Size of swing

The size of the swing does not have large effect on the time.

Mass

The mass of the pendulum does not affect the time at all.

Prediction
The diagram shows the arcs through which two pendulums swing. The red one is twice the length of the black one. The black arc is always at a steeper angle than the red arc, and always above it.

Middle

10

10

25.41

2. Altering the mass of the bob

The mass was altered by a measurement of 20 grams. This had a small effect on the time.

 length(cm) mass(g) displacement(cm) time (20 swings)(seconds) 60 5 10 31.02 60 25 10 31.16

3. Altering the displacement of swing
the size of the swing was changed by a measurement of 20 cm and this had little effect on the time.

 length(cm) mass(g) displacement(cm) time (20 swings)(seconds) 60 10 10 31.05 60 10 20 31.39

From the trial data I found

Conclusion

The even trend in the graph specifies that the results are accurate and dependable. There are no irregular results to be seen in the trend of the graph.

Reliability

No significant problems or difficulties were met when performing this investigation. The accuracy and reliability of the results and conclusions are incredibly good. From the accuracy method applied and for the range of values tested, it is quite understandable that the time for a simple pendulum takes for a complete swing is proportional to the square-root of the length.

### Improvements

The procedure used was simple and straightforward and no difficulties were encountered. A small improvement could be made regarding the measuring of the length pendulum. A piece of wood, could be placed level with the point of suspension, and a set square could be placed along the flat side and just touching the bottom of the pendulum. This distance could then be measured extra accurately than trying to guess where the middle of the bobble is.

More attempts could be taken but I do not think it is necessary or would make a significant difference to the morals of the conclusion.

Longer lengths could be tried, up to whatever lengths desired. If the pendulum gets very long a stronger string will be needed and a bobble in ratio.

Extending the investigation

Extending the investigation would mean extend the range of lengths tested and observing if the same trend continues. Add more to the extension

This student written piece of work is one of many that can be found in our GCSE Forces and Motion 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 GCSE Forces and Motion essays

1. ## Determining the acceleration due to gravity by using simple pendulum.

so as to get the acceleration due to gravity by the derived formula. Even if we plot a graph of Velocity against Time the slope of the graph or the gradient would give us the acceleration due to gravity SOURCES PF ERRORS Sources of errors are always present for this experiment.

2. ## Squash Ball and Temperature Investigation

a good set of result such as the time the ball will be heated for before it is tested at different temperatures, the height at which it should be dropped to obtain good results and finally, which type of ball to use.

1. ## Practical Investigation Into Viscosity

Therefore I settled for 20cm intervals but timed from a 10cm starting point. This worked particularly well and produced the results that follow this explanation. Now that I had my first set of results, I thought I would introduce a variable of five differently sized ball bearings.

2. ## Friction Investigation

are very reliable, as the line of best fit was very easy to draw, and it can be seen that all of my results are very close to this line. There are also o anomalies present in my results. This is because I took great care in my experiment.

1. ## The determination of the acceleration due to gravity at the surface of the earth, ...

Check that the string passes through where the 2 drawn lines on the underside of the wooden blocks too. Adjust the string if needed and when in the correct position, tighten the clamp. 6. Now attach the 180? protractor (using blue tack)

2. ## Investigating the amazingness of theBouncing Ball!

This height will be calibrated with spirit measures and right angled traingles placed at the bottom to keep the metre rule perpendicular to the ground. This rule will be sellotaped to a shorter table so that it is held upright.

1. ## Strength of a string practical investigation

r�, to obtain the cross-sectional area of the string. 4. I will place the meter rule on the table, using sellotape to keep it steady. The G-clamp and pulley will also be clamped to the table at this time, pulley at the end of the table and G-clamp at approximately 0.7 metres from the pulley (as shown in Figure 1)

2. ## In this experiment I aim to find out how the force and mass affect ...

top of the ramp being converted into kinetic energy at the bottom. I've taken this theory from the source book 'Physics For You' (Keith Johnson) on page 115 where it simply explains the fact in a basic diagram of a diver climbing to the top of a board.

• Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to