In a message dated 1/27/2003 4:26:01 PM Eastern Standard Time, Philip Hart <philiph at SLAC.Stanford.EDU> writes: >On Mon, 27 Jan 2003 Gaertk at aol.com wrote: >> I was really, really annoyed when I learned >> the truth about pendulums.... >Hi, what's controversial about pendulums? Are you concerned >about the small-angle approximation? Yes, specifically the fact that they taught me that pendulums were perfect examples of simple harmonic motion where the angle of displacement has NO EFFECT on the period, no matter how large the angle. --KG