Two strategies for optimizing the use of video analysis in experimental teaching activities

Video analysis is an experimental resource that is widely used in experimental activities linked to physics teaching. The capture of positions and distances in the frames of a video is affected by possible perspective distortions resulting from the positioning of the camera (generally a cell phone) in relation to the plane in which the movement occurs. The positioning of the markers on the moving object, in turn, depends greatly on the sharpness of the images. In this work, strategies for proper camera positioning are discussed, as well as the need for adequate lighting. At the end, an example is presented in which these adjustments produce accurate results.

Keywords
Video analysis; perspective distortion; image sharpness of moving objects