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

science pendulum experiment

Extracts from this document...


Jason Prasad

Science Coursework-



My aim of this investigation is to see how the length of the string affects the time it takes for a pendulum to oscillate.

There are many factors that could affect the pendulum swing.

  • Length of string
  • Angle Release
  • Gravity
  • Air resistance
  • Colour of bob
  • Mass of bob
  • Temperature
  • Thickness of string

After going through possible factors, I have narrowed my search for a factor down to four possible ones.

 The length of the string is a factor. Changing this will affect the distance traveled because the longer the piece of string the more distance it has to cover. This should make the pendulum take longer to complete one full osolation. This is important because the further the pendulum swings, the longer it will take.

The angle of the swing angle is another factor that may affect the pendulum. The higher the angle, the longer it will take for the pendulum to swing because it has further to travel.

Air resistance may also affect the time taken for the pendulum to osolate. Unfortunately I cannot control this factor, but in the science lab I don’t think that this will be a

...read more.



I predict that the longer the string, the more time it will take for the pendulum to swing.  I predict this because when the string is shorter the distance it needs to travel is also shorter, therefore reducing the time.

I will also need to draw a graph in the latter stages of this investigation. I think that the graph will look like this:


        First to complete the investigation I will need to get all my apparatus. When I have collected this I will need to set it up in the correct way so that my investigation will be a fair and accurate one.  I will get a clamp stand and clamp 2 blocks of wood together. In between the two blocks of wood a piece of string, attached to it a weight (the bob), will be present. This string will be moved up and down so that I can use different lengths. Some tape will be wrapped around a protractor, which will be attached to the two wooden blocks. When the experiment is set up in the correct manner, the investigation can be performed. image01.png

         I will time ten swings for each length of string, and will right the results down in the results table.

...read more.


The measurement of the string could also be improved. More precision in measuring lengths could be used for more accuracy in the results. Again, I do not believe this will affect the outcome of the final conclusion.

The equipment that was used could also be improved. More updated, better conditioned equipment would help to the accuracy of the results.

If the experiment could be extended, I would try a few other things. I would test the other variables; for example the release angle and mass of the bob, and see how they affect the oscillation of the pendulum. I would also try out further lengths of string. This would improve my experiment by making it more reliable and more accurate. Sticking with the string, I would test different materials to see if the material of the string affected the pendulum oscillation. One other thing that I may do is see if there is another way to swing the pendulum, for example instead of swinging the pendulum backwards and forwards I would try and swing it in a horizontal circular path (conical pendulum), and compare those results with these ones.

...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. Marked by a teacher

    Physics Pendulum Experiment

    3 star(s)

    The accuracy of our results could also have been enhanced by carrying out more preliminary tests. This would help in the way in which I carried out my experiment, as well as helping me get used to the various mass and springs.

  2. To investigate the time taken for the pendulum to oscillate for a time period.

    This proves that the equation T = 2? ?(l /g) is correct at determining results for the time period of one oscillation for a pendulum in simple harmonic motion. This is because all the relevant and depending forces are used in the formula whereas the independent ones such as mass and amplitude are left out.

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

    as this is included in the formula for potential energy, the height of the ramp should affect the speed of the trolley in some way. I will be modulating this variable in the primary experiment, but it should be constrained to a single height in the secondary experiment.

  2. Squash Ball and Temperature Investigation

    On the sketch made in the "prediction" section, I drew a steep curve, as I believed that the gradient would be far bigger as the ball will bounce back more than double when the temperature is doubled. But the calculated gradient on the graph also supports the fact the ball

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

    I also decided that it would be necessary to become accustomed to the rhythm of the oscillations before starting to count them. This would be done by counting down to 0, counting 3, 2,1, 0... as the pendulum completed these oscillations and as the bob hit the left extreme on the 0 count, start the stop watch.

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

    This distance could then be measured more accurately than trying to guess where the middle of the bob is. The diameter of the bob could be accurately measured with some vernier callipers so that the true length of the pendulum could then be calculated. The thread used was quite stretchy.

  1. What affects the time period of a pendulum.

    Measure the string to the desired length 2. Place string on centre of bob 3. We then pulled the string back to 15 degrees 4. We then released the bob and started the stopwatch at the same time. 5. We let the bob swing backwards and forwards 10 times 6.

  2. What Factors Affect the Period of Oscillation of a pendulum?

    how long it takes for one oscillation in seconds and recording that as well. The reason why I'm finding10 oscillations first is because it is hard to time 1 oscillation with an ordinary timer. The test will be done twice for two reasons; one is to confirm that the experiment

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