Pendulum Experiment Essay

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Determination of “g” by the use of a Pendulum This experiment is going to utilize a bob on the end of a string line to determine the value of little “g” by measuring the length of the string and the duration of time it takes for the bob to swing from one fulcrum point back to the same point after swinging 10 times. The justification for the bob swinging 10 times is to generate a more accurate measurement of time. To start the supplies that are required for this experiment are a stable stand for the string to be secured to. A minimum of a two yard line of string to that can be secured to the anchor and a bob and obviously a bob to be attached to the end of the string. We also need a stopwatch to measure the time duration and a measuring tool to determine the length of each experiment. Once the bob is attached to the string and the string is secured to the anchor we take a measurement of the distance from the anchor to the center of the bob. Next we hold the stopwatch and pull the bob out about a few inches and as we let it swing we start the stopwatch and let the bob swing from side to side ten times and stop the time when the bob reaches the starting point on the tenth swing. Once the stopwatch is stopped record the time measurement and move the decimal place to the left one place or divide by ten to average the ten complete swings. Next we will take two raps of the string on the anchor point and measure the distance from the anchor to the center of the bob and record that measurement. We repeat the process of pulling the bob out a couple inches and start the stopwatch and let it swing ten times and when the bob reaches the same side it started stop the stopwatch again. Repeat this process until you can no longer get an accurate measurement of the swinging bob. Once you complete this process you should end up with a set of data that looks like the list

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