Analyzing Period of Simple Pendulum

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Presentation transcript:

Analyzing Period of Simple Pendulum Teofilus Gunawan (teo_gun@yahoo.com) Forestview High School; Gastonia, NC Summer Ventures in Science and Math 2008 Visual and Image Processing Dr. Rahman Tashakkori and Mr. Jere Miles Appalachian State University, Boone, NC; July 26, 2008

Introduction Simple pendulum Period of a pendulum Conservation of energy PE = KE

Background Zhang Heng (Han Dynasty) Galileo Galilei (1564-1642) Isochronism Jean Richer (1671) Gravity ‘s role in pendulum

Applications of pendulum Pendulum clock Metronome

Dependent and independent variables Three factors that could change a pendulum’s period are: Amplitude of pendulum swing Length of the string or attachment Mass of the bob

Standard physics equation T = period in seconds L = length of pendulum in meters G = acceleration of gravity

The experiment Pendulum Photogate (laser gate) Computer interface Meter stick Protractor Measuring the period using Vernier device Taking video using Logitech cam recorder

Pendulum setup

Result - amplitude variation

Result – length variation

Result – mass variation

Logitech before

Logitech after

Conclusion Results came relatively close to the standard model. Air resistance played a role in slowing down the pendulum. Further reasearch

Acknowledgements Vernier phsysics Dr. Rahman Tashakkori Mr. Jere Miles Tushar Bulsara Summer Ventures group

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