Journal
EUROPEAN JOURNAL OF PHYSICS
Volume 30, Issue 5, Pages L79-L82Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0143-0807/30/5/L05
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In a recent letter, Belendez et al (2009 Eur. J. Phys. 30 L25-8) proposed an alternative of approximation for the period of a simple pendulum suggested earlier by Hite (2005 Phys. Teach. 43 290-2) who set out to improve on the Kidd and Fogg formula (2002 Phys. Teach. 40 81-3). As a response to the approximation scheme, we obtain another analytical approximation for the large-angle pendulum period, which owns the simplicity and accuracy in evaluating the exact period, and moreover, for amplitudes less than 144. the analytical approximate expression is more accurate than others in the literature.
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