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# Music: it’s all in the physics

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## Haydon Foltz

on 21 February 2013

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#### Transcript of Music: it’s all in the physics

Guitar: it’s all in the physics a presentation by: Haydon L. Foltz Newton’s first law of motion: How does this have anything to do with the guitar?
The strings don’t move until they are struck with the pick or plucked with ones fingers.
In a world with no friction, the strings would move forever.
friction would be the force that would cause the strings to stop moving
The friction that would affect a guitar string the most would be
fluid friction or air resistance.
Sliding friction an object that is at rest will stay at rest unless an unbalanced force acts upon it, and an object in motion will stay in motion until an outside force is acted upon it. When looking at this from a guitar point of view, look at the strings.
All six of the strings are a different thickness, of a different mass. This means that each of the strings needs a different amount of force to get them moving.
In other words, the thicker strings with more mass need more force to accelerate.
The difference in the strings may be visible to the eye, but it’s a slight difference. Its so slight that when you play you don’t have to think about how much force you put in to each string to get them to accelerate. Newton's seconded law of motion: the greater the mass an object greater the amount of force needed to accelerate the object. [ F=MA] looking at the guitar, for this law look at how much force you apply when strumming the guitar.
If you apply little force to the string when you strum it then, the string will give an equal reaction.
If the strum was down, then the string will vibrate upwards the same force that was applied to it.
If the strum had a lot of force to it the more force the string will move with.
When it comes to guitar the reaction will include how much noise the instrument will make.
So the more force that is applied the equal and opposite reaction would be the string moving in the opposite direction with the same force, but the reaction for the guitar also includes the sound the vibrations make.
The more force that is applied the loader the noise the guitar will make. Newton’s third law of motion: every action there is an equal and opposite reaction. Video: Waves on guitar strings I couldn't find a video on newtons laws effects on playing the guitar. so here's a quick video that shows how waves travel on the strings of a guitar.
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