You guys don't know enough about basic physics to even be discussing wave theory. In order for a body to move, a force needs to > be applied (Newton's first law) Newton's First Law, ( the apple hits me on the head ). The Law of Gravity. He said gravity is a Force that increases the speed of an object by a constant amount. 10 meters a second every second was what he measured it to be. Hence the term acceleration measured in (distance/sec)/sec. Then he theorized that the Force of an object was the product of its mass and acceleration. F=ma. Newton's Second Law. Now use your calculus to derivate the formula (acceleration becomes 0, velocity is constant) and the formula becomes F=m(velocity squared). F=mv2. The heart of vector analysis. It also explains why your tack hammer rebounds so dramatically from the tuning pin. For every action there is an equal and opposite action. Objects in motion will remain in motion unless acted upon by an external force. Sound familiar physics students? Not very useful for wave theory. As for what the action of the bridge is, I offer proof that the strings stabilize the bridge. At the Reno convention I watched Virgil tune. He claimed the note dropped in pitch when he pulled the mute and tuned the second string. He showed us orally that this was true. Dr. Sanderson then came up and measured the difference. Dr Sanderson said the second string set itself up in opposition to the first string creating less movement of the bridge and there by less stretch of the string and an equivalent drop in pitch. "set itself up in opposition", now there's a man who understands wave theory. Keith Roberts Check out this site. Course notes for the physics of sound. http://online.anu.edu.au/ITA/ACAT/drw/PPofM/
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