Abstract
Although the approximation to calculate the period of a simple pendulum is well-known and studied from the first year of high school, it only has good results for small oscillation amplitudes. Now, the approximations for large oscillation amplitudes are almost completely unknown by the vast majority of theachers and students of high school and of undergraduate. Hence, in this work, we review the main approximation suggestions for large oscillation amplitudes to calculate the period of a simple pendulum and we make a comparison between their results, too.
Keywords:
simple pendulum; linear approximations; large amplitudes