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# Lab 1 - Lab#1 Graphing and Data Analysis Dustin Johnston...

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Lab #1 Graphing and Data Analysis Dustin Johnston Physics 118 Spring 2008 Introduction In this lab our goal was to use a simple pendulum as a model to develop an empirical law. Though this lab we studied the way changing one variable, while keeping the other variables constant we could determine the outcome of changing that variable. Procedure The lab required photo gate timers measure the time period for a free hanging pendulum which was comprised of a string hanging from a iron bar attached to our lab table on to which a ring stand was attached. The photo gate was then placed below the pendulum with the two uprights on either side of the ring stand so that each period the pendulum would pass though the photo gate. The first step was to measure the effect of varying mass on the time period. We started by keeping a constant length of 54cm in the piece of string (constant variable) and an angle of 20 degrees (second constant variable) for all of the measurements. We then used weights with

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