• 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. Squash Ball and Temperature Investigation

    (See diagram on next page) Fair Testing and Variables Testing has to be done fairly in order to achieve accurate and reliable evidence, which a correct and scientifically sound conclusion can be made from. A number of factors, which could affect the height of the bounce of the ball, are:

  2. Practical Investigation Into Viscosity

    Time taken(s) for ball bearing to pass through distance measured 1 2 3 Average 0-20 0.86 0.84 0.85 0.850 10-30. 0.69 0.67 0.68 0.680 20-40 0.62 0.62 0.62 0.620 30-50 0.62 0.60 0.61 0.610 40-60 0.61 0.62 0.61 0.613 Medium Distance Timed (cm)

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

    Release the pendulum, so it starts swinging. Make sure it is swinging in one plane, so from right to left and not on more than one plane, perhaps in circles. If it is, stop the pendulum and do this again. You will need to make sure that when you measure the 10?

  2. Investigating the amazingness of theBouncing Ball!

    The wider the range of temperatures the better To ensure the ball is at the temperature desired when conducting the experiment the ball was left at these temperatures for at least half an hour. The time between the bounces is used to work out the height reached by the ball

  1. Strength of a string practical investigation

    Table 2 In the preliminary experiment I increased the weight in 200g steps. This proved to be a problem as the double stranded string did not break by increasing the mass by 200g each time and this would be a bigger problem when conducting the experiment on the triple stranded

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

    in my hypothesis. Method One I will set up the apparatus as shown above and to the specifications on the Practical Cover Sheet. Then I will place two stools at either side of the apparatus, on one of the stools I will place a light connected to a lab pack

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