Exploring Systematic Error With Digital Video

Details Exploring Systematic Error With Digital Video Exploring Systematic Error With Digital Video

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20914801k&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #148.01; Bulletin of the American Astronomical Society,

Physics

Scientific paper

Digital video acquisition and analysis has become user-friendly and affordable with the advent of webcams and software such as Vernier’s LoggerPro. The analysis of the ballistic trajectory of a ball has been a fixture in the physics lab curriculum at Swarthmore College for many years. When we updated the experiment to use digital video rather than stroboscopic photography, the data acquisition and analysis became almost trivial. We realized this gave us the opportunity to use an experiment with very precise data and a well-defined expected result (the acceleration due to gravity, g) to teach about systematic error and ways to correct for it. In this paper we describe modifications to the lab procedure that demonstrate systematic errors due to calibration, perspective effects, and air drag.

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