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  • Level: GCSE
  • Subject: Science
  • Document length: 624 words

Investigation in to the simple pendulum.

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Investigation the simple pendulum Plan For my experiment, I am going to investigate the simple pendulum. The simple pendulum is a piece of string attached at one place from where it will pivot; at the bottom of the piece of string is some kind of bob. There are certain variables that have to be taken into account: Air resistance, time for one swing (period), the weight of the bob, the angle of swing and the length of the string. I don't feel that I really need to take into account the air resistance, as the string is thin and the bob is round, it will cut through the air easily and will not slow down the pendulum a great deal.


the pendulum may be travelling faster when it is released at near horizontal but it has a lot further to go than when it is released at nearly vertical. I am therefore going to measure the length of the string against the time it takes for it to swing one period. Method Apparatus: Stand 4X10g weights Clamp Weight holder (10g) Boss Stopwatch String Ruler Diagram I am going to set up the equipment and then I am going to start with 60cm of string as this is my highest value. I will attach the weights to the bottom of the piece of string they will be 50g in total.


easier to take the time at that point as I wouldn't be sure when the pendulum reaches the top on the swing. There are no safety precautions that need to be taken except that care must be taken when cutting the string. My prediction is that as you increase the length of the string the length of time will also increase. I think that as you double the length of string the time taken for a period will double. The table that I will use for my results will be this: Length (cm) Time for 10 periods (seconds) Average (seconds) Average/10 (seconds) 1 2 3 60 50 40 30 20 10 The graph which I expect to be able to draw will be this:

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