Grandfathers Clock
Posted February 21, 2011
By admin
Why does a lowering amplitude of a pendulum not affect a grandfathers ability to tell time?
As a pendulum swings back and forth in the real world, it's amplitude slowly gets lower. This happens inside a grandfather clock as well, but does not affect its ability to keep time. Why isn't this a problem?
So long as the amplitude is small, the pendulum follows Simple Harmonic Motion. Thus, until it stops, the accuracy does not deteriorate since the period does not depend on the amplitude but only on the mass of the pendulum bob and the length ( for SHM ).
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