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

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.

...read more.

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

...read more.

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

...read more.

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

See related essaysSee related essays

Related GCSE Forces and Motion essays

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

    We have neglected the air resistance, mass and many other variables which could help to find the accurate value of acceleration due to gravity. The sources of errors in my experiment were rounding off values which may vary the outcome of the results calculate with the formula.

  2. Practical Investigation Into Viscosity

    2.17 2.173 40 2.46 2.37 2.39 2.407 50 2.76 2.71 2.72 2.730 60 2.92 2.96 2.90 2.927 70 3.54 3.50 3.52 3.520 80 6.15 6.10 6.30 6.183 The next section that starts on the following page displays graphically the results and other relevant information of the experiments mentioned in this report.

  1. Squash Ball and Temperature Investigation

    Using tongs to hold the ball under water, heat the ball in the beaker full of water at 850C (add ice if necessary to cool down then temperature of the water) for 60 seconds. 4. While the ball is being heated, set up your 1 metre rule on a

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

    reaction time will be the same when starting the stop watch to when stopping it. This means that it will not affect the results and so no precautions need to be taken, except to make sure that the stop watch is started when the pendulum begins its first oscillations and then stopped when it has completed its 30th oscillation.

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

    This experiment would provide both and very accurately. The experiment would also be a lot simpler, I believe that the simpler the experiment the more accurate it will be and the lower the chance of human error. The clock would measure the time and all I would have to do

  2. Investigating the amazingness of theBouncing Ball!

    Silicone is a polymer made by addition polmerisation: Silicone as a monomer Silicone as a polymer An alternating silicon-oxygen atom pattern form the backbone. Polymers are produced when molecules within a small molar mass join up to become molecules with very large molecular masses.

  1. "Oh My Elbow - Investigation Into Force Applied To Elbow Joint".

    back to them when my investigation is complete and also have some pattern of results that I can compare with. Simplistic View This diagram above is a simplistic view of what we are trying to measure. From Module 1 we can use the principle of moments to calculate the force,

  2. Strength of a string practical investigation

    The room temperature will have to remain constant throughout the period of experiment as if it fluctuates dramatically then this will affect how the strings will react to forces added to them, as if at the start of the experiment the room is at a stable 23 degrees and by

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