Posted by Will (207.223.241.117) on September 10, 2003 at 11:33:12:
In Reply to: Re: Porch Swing Dynamics posted by Michael on September 10, 2003 at 11:31:01:
Another case in point.
: Yawn...!
: someone else who doesn't understand physics.
: : Show of hands.....who here has ever swung on a porch swing? That many? Great! Now, who here has ever used the portion of the legs from the knees down as the sole motive force to swing themselves? Yes, a simple pleasure, was it not? As a child with spry, springy legs, you could keep it going for as long as you wanted, no problem! Such a simple act gone largely unnoticed as to it's deceptively complex dynamics. You see, to keep oneself going on a porch swing requires only that you bend the knees and drop the legs a few degrees and then straighten them again. Gee whiz, what is so cool about that? Well,for many of you, probably not a thing......