McGee 1
Lab M10
Simple Harmonic Motion
Allison McGee
Dr. Kesling
Tuesday 8:00am10:50am
Partner: Joshua Beach
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Abstract
: The purpose of this lab was to use the equations that describe the period of a
simple pendulum to determine the local acceleration due to gravity. From our slope of T
2
vs. l (in meters), we were supposed to receive a yintercept of .248. We received a slope
of .2465. This leaves a percent error of .6%.
Introduction
: A simple pendulum is a mass suspended to a length of string. When the
pendulum is started to oscillate, the period T can be found by the equation:
T=2
π
(l/g)
1/2
The variables that affect the period are the length of the string l and gravity, g. By
rearranging the equation, we can yield a y=mx+b equation:
l= (g/4
π
2
)T
2
.
Equipment
: String on a fixed position, stopwatch and mass on string.
Experimental Procedure
: To start this lab, we measured the diameter of the mass with
verneir calipers. We then measured a certain length of the string, l. We started the
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 Fall '08
 Fedorchak
 Simple Harmonic Motion, Allison McGee

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