並列摘要
Regarding simple harmonic motion as the projection of uniform circular motion onto a diameter is a typical method appeared in many textbooks of general physics. The aforementioned concept has been displayed traditionally by means of physic based animations. In this paper, we propose a new physics experiment to record and analyze the x-component of the trajectory of the object undergoing uniform circular motion by using a high-speed camera and a free-software Tracker. Based on the experiment, the relation between uniform circular motion and simple harmonic motion can be demonstrated easily and quantitatively. Teachers can therefore attract students' interest in the problems of simple harmonic motion.