Excellent example! Thank you Brian.
________________________________________
From: Phys-l [phys-l-bounces@phys-l.org] on behalf of brian whatcott [betwys1@sbcglobal.net]
Sent: Friday, November 15, 2013 7:06 PM
To: phys-l@phys-l.org
Subject: Re: [Phys-L] Energy & Bonds
In the relatively recent design of the compound bow (for projecting
arrows), a system of cams and cables tailors the draw string force to
achieve an early peak to the force-deflection diagram, followed by a
significant reduction of force (by 80 or 90% even 100%!! near the
maximal deflection, which permits maximal energy storage with easiest
pointing on the target. An aiming system using a peep sight imbedded in
the string, along with one of more pins mounted at or in front of the
bow riser is used to permit comparative ingenues to place a cluster of
arrows in a one or two inch diameter circle at a range of 20 yards.
Some bow sights include optics which allow a magnified target view (X4
or more) for competition style results.