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

Pendulum.The length of the pendulum will affect the period (T). An increase in length will produce an increase in time. This can easily be seen when I look at the results table.

Extracts from this document...




The aim of this experiment is to investigation of gravity by sample pendulum affects the time for complete swings.


A pendulum is a device which consists of an object suspended from a fixed point that swings back and forth under the influence of gravity. This effect is known as gravitation. However simple it may seem, this structure is very beneficial in our everyday life for it is used in several kinds of mechanical devices such as the all popular grandfather clocks. In addition to this, a pendulum could determine the local acceleration of gravity. This is the case, as the strength of gravity varies at different latitudes and as gravity is one of the main forces acting on the pendulum, the acceleration of gravity could be noted. Further uses of the pendulum are found in the field of astronomy for some have been used to record the irregular rotation of the

...read more.


Let the bob swing backwards and forwards 20 times oppressed Then stopped the pendulum swinging and recorded the times. Then I repeated experiment with the same length 3 times.

Fair Test:

To make the experiment as fair as possible the same bob and equipment were used for each experiment. The length of pendulum was measured from the base of the split cork to the middle of the metallic bob. The angle at which the bob swung also had to be the same.


There are many accidents that could happen if this experiment was not carried out safely; below I have outlined a few simple guidelines to prevent such accidents occurring.




Bob swing

Could hit someone

Do not swing the bob from large angles

Clamp stand

Could fall over and hit someone

Make sure a large mass is holding it down

...read more.



I used the method proposed in my plan, taking three readings of each value and measuring the time taken for 20 oscillations rather than for 1. During the experiment, I observed that each oscillation for the same length of string seemed to be equal. This showed that the pendulum did not slow down as the number of oscillations increased. I took the safety measures described in my original plan.

During the experiment I was careful to use accurate measurements in order to obtain sufficiently accurate results, for example:

- The string was measured with a meter ruler, to the nearest cm, to
ensure that each measurement had a difference of exactly 10cm.

- The angle of amplitude will be measured with a protractor to the
nearest degree to ensure that the angle remains constant throughout
the experiment.

- A stopwatch will be used to measure the period accurately. The period
was measured in seconds, with the stopwatch measuring to a degree
of accuracy. However, I have rounded up each time to the nearest second to give appropriate results.

...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

    Which factors affect the time period of the swing of a pendulum?

    3 star(s)

    The reason that a pendulum has a higher time period as it gets longer is because it has a further distance to travel to reach the central measuring point, as it rotates in a circular motion, as the length of the pendulum increases, the circumference of the circle created would

  2. Marked by a teacher

    Investigating a factor which can affect the period of a pendulum.

    3 star(s)

    When plotted on the graph, the last result does not have as big a difference with the previous result than that of all other results. These inaccurate results and one anomalous result acquired in the experiment are, most likely, due to human error.

  1. Marked by a teacher

    Investigating how the Length of a Pendulum affects its Period

    3 star(s)

    This is because over one period the inaccuracies of my reflexes would be a larger percentage of the overall time. Whilst over 10 periods the inaccuracies would be spread across 10 swings and thus the percentage would be lower. Therefore I shall time the swing of 10 periods meaning that there is less chance of discrepancies.

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

    To measure changes in the gravitational acceleration down to 1 part in 40 million using an instrument of reasonable size (say one that allows the object to drop 1 meter), we need to be able to measure changes in distance down to 1 part in 10 million and changes in time down to 1 part in 100 million!!

  1. Period of Oscillation of a Simple Pendulum

    Only that way could we say if angle of release affects time of oscillation. Finally, length certainly does affect the time oscillation. I have proven this with two different ways. Firstly, my results follow a distinct pattern. There is a positive correlation between time of oscilation and mass.

  2. Factors that affect the period of a pendulum

    Main Investigation: Length of String I decided to choose Length of String for my investigation, because, my results for that preliminary had the one of most noticeable relationships between the independent and the dependent variable as well as the fact that there were no outliers.

  1. Find which factors/variables affect a pendulums period (time taken to do one oscillation) and ...

    1.30 35 1.22 1.36 1.34 1.37 1.44 1.43 Average of the two sets: Mass/g Length/cm 40 45 50 55 60 65 10 0.81 0.59 0.58 0.65 0.69 0.77 15 0.87 0.84 0.82 0.96 0.97 1.02 20 1.00 0.92 0.95 1.01 1.03 1.04 25 1.08 1.13 1.09 1.19 1.20 1.21 30

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

    * Measuring the length of the pendulum needs to be done in the same way for each length of the pendulum The length of the pendulum is the independent variable in this experiment. It will be changed and the period for each length of the pendulum calculated.

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