How do you determine the amplitude of a wave exhibiting simple harmonic motion?

by BrendanC
Tags: amplitude, determine, exhibiting, harmonic, motion, simple, wave
BrendanC is offline
Apr17-09, 08:25 AM
P: 1
When a string, fixed at both ends, has a force exerted on it, how do you determine what the amplitude will be, if the tension, applied force, and length are known?
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quantoshake11 is offline
Apr18-09, 02:40 PM
P: 40
i have no idea, but clear this up for me, is the string resonating on these frequencies? i think so, and if it is, the amplitud ought to diverge, am i right? i've thought about this for a while, for i needed to measure these frequencies on the lab and i wanted to know where to put the oscillator so it would all move as smooth as it could.
staticd is offline
Sep1-09, 10:31 PM
P: 60
How is the force acting on the string? Is it a pulse?

If so the amplitude of the anti-node of the string is a function of the intensity displacement. In other words, if the string has a tension on it (some mass) and then you vibrate the string, the amplitude of the vibrator will determine the amplitude at the resonant frequency. In my experience that's around 60 Hz with a 20 Hz step bandwidth to the next resonant frequency.

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