期刊
EUROPEAN JOURNAL OF PHYSICS
卷 37, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0143-0807/37/5/055006
关键词
vertical circular motion; nonuniform circular motion; projectile motion
Vertical circular motion is a widely used example to explain non-uniform circular motion in most undergraduate general physics textbooks. However, most of these textbooks do not elaborate on the case when this motion turns into projectile motion under certain conditions. In this paper, we describe thoroughly when a mass attached to a cord, moving in a vertical circular motion, turns into a projectile and its location and velocity when it rejoins the circular orbit. This paper provides an intuitive understanding, supported by basic kinematic equations, to give an interesting elegant connection between circular motion and projectile motion-something lacking in most physics textbooks-and will be very useful to present to an undergraduate class to deepen their understanding of both models of motion.
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