Physics – Physics Education
Scientific paper
2011-06-09
American Journal of Physics, 78, 433-436 (2010)
Physics
Physics Education
13 pages, 5 figures
Scientific paper
We describe an experiment involving a mass oscillating in a viscous fluid and analyze viscous damping of harmonic motion. The mechanical oscillator is tracked using a simple webcam and an image processing algorithm records the position of the geometrical center as a function of time. Interesting information can be extracted from the displacement-time graphs, in particular for the underdamped case. For example, we use these oscillations to determine the viscosity of the fluid. Our mean value of 1.08 \pm 0.07 mPa s for distilled water is in good agreement with the accepted value at 20\circC. This experiment has been successfully employed in the freshman lab setting.
Anwar Muhammad Sabieh
Shamim Sohaib
Zia Wasif
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