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An investigation of the factors affecting the period of a pendulum

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An investigation of the factors affecting the period of a pendulum

I could investigate the following factors:

  • Angle of displacement
  • Length of string
  • Pendulum weight

I am going to investigate and see if varying the length of string will affect the period of the pendulum.

My prediction is: The longer the string the longer the period. The period will be longer as the pendulum has farther to travel. My theory is demonstrated below.


I made my prediction based on a previous experiment I have done. The length affected the period as stated above and I think this will happen again in this experiment. I looked at a clock with a pendulum to see how it worked.

...read more.


Not to swing the pendulum near others

To ensure the test is accurate I am going to:

  • Run the experiment 3 times and take an average
  • The time for one oscillation is very small so I have decided to measure 10 oscillations then divide the result by 10 so I obtain a more accurate set of results.
  • Double check all measurements of string
  • Use the same angle of displacement (amplitude)

In my experiment I used the above ways to keep the test fair and accurate. I also did the experiment 3 times and so I could take an average.

...read more.


Where we hung the pendulum. I would change this because sometimes the pendulum hit the table and clamp stand whilst swinging so ideally we would have liked to hang it from the ceiling or hook.

I also think I have enough evidence to support my conclusion as all our results showed the same relationship between length of string and I also referred to the clock mechanism in my prediction so I think I have enough evidence to support my conclusion.

I could also perform more experiments to research the pendulum more. By changing the weight of the pendulum or even changing the angle of displacement. Doing this would give me a wider knowledge of why the pendulums oscillations vary

...read more.

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