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Systematic Errors In Video Analysis, Tim Martin, Kayt Frisch, John Zwart
Systematic Errors In Video Analysis, Tim Martin, Kayt Frisch, John Zwart
Faculty Work Comprehensive List
Video analysis helps students to connect physical, mathematical, and graphical models with the phenomena that the models represent and improves student kinematic graph interpretation skills. The wide-spread availability of easy to use software packages like Logger Pro (Vernier), Capstone (PASCO), and Tracker have led to many introductory physics courses adopting video analysis techniques in the classroom. Such uses include high-speed cameras to study rocket launches and other innovative applications. In this paper, we will look at ways in which some common systematic errors can affect outcomes.
Systematic Errors In Intro Lab Video Analysis, John Zwart, Kayt E. Frisch, Tim Martin
Systematic Errors In Intro Lab Video Analysis, John Zwart, Kayt E. Frisch, Tim Martin
Faculty Work Comprehensive List
In video analysis lab experiments, students frequently find large discrepancies between results based on self-filmed videos and expected values (e.g. for g determined by a fit to projectile motion data). These differences are frequently far larger than the uncertainty calculated from their fit. Using an inexpensive point-and-shoot camera with a 4x optical zoom to record video, we investigated two possible causes of this error: the effect of placing the reference meter stick at a different object-to-camera distance and the effect of the motion of interest being in a plane not perpendicular to the camera lens. When we observed these phenomena …
Systematic Errors In Intro Lab Video Analysis, John Zwart, Kayt E. Frisch, Tim Martin
Systematic Errors In Intro Lab Video Analysis, John Zwart, Kayt E. Frisch, Tim Martin
Faculty Work Comprehensive List
In video analysis lab experiments, students frequently find large discrepancies between results based on self-filmed videos and expected values (e.g. for g determined by a fit to projectile motion data). These differences are frequently far larger than the uncertainty calculated from their fit. Using an inexpensive point-and-shoot camera with a 4x optical zoom to record video, we investigated two possible causes of this error: the effect of placing the reference meter stick at a different object-to-camera distance and the effect of the motion of interest being in a plane not perpendicular to the camera lens. When we observed these phenomena …