The plan motion of a free rigid body is analyzed from a video capture webcam. The absolute experimental trajectories of two points of the body allow to determine the relative trajectory of a point from the other point. The kinematic characteristics: speed, instantaneous speed of rotation, the initial kinematic conditions (positions, velocities) are determined by the inverse method from a Maple procedure based on nonlinear adjustment of Statistic package. The trajectories obtained are in good agreement with theoretical predictions. The law of transformation of velocities change is fully verified.
The objective of this paper of explaining in a simple way, the rotation of the earth from the relative trajectories of Foucault's pendulum on a rotating turntable, a pedagogical approach based on the history of science. University students with the opportunity to achieve and improve the understanding of the rotation helped plan cycle in which the pendulum oscillates in a rotating frame without external intervention, can only be explained because the earth insists on turning on itself, and for several billion years, en particular the existence of the effect of inertia forces. On the other hand a digital camera Sony 10 Megapixel Cybers hot shooting to take snapshots of the swinging pendulum has been used, is to transform the video taken by the camera in kinematic trajectory. This is possible using suitable software such as Latis-Pro, etc ... avemica. We opted Latis-Pro, more user-friendly, feature-rich processing and compatible with Excel, simulates the relative motion of the pendulum.
The aim of this paper is to present a study on a difficult concept for students to understand the concept of inertia forces. We are focused of directed an experimental bench pedagogical nature to facilitate and improve the understanding of students, especially students 'preparatory class and first university year' of confronting the theoretical simulation model with Maple experience, and acquire technological and methodological competency. On the other hand and observed to analyze the extreme sensitivity of the trajectories relative to a rotating frame without external intervention, the initial conditions of launch of the ball and the intensity of the rotational speed and position of the plate initial vector launch, the relativity of motion and in particular the study of inertial forces on a rotating turntable. Using a digital camera, the videos are processed by a pointing Latis-pro software.
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