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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 …