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Simple harmonic motion  vibration frequency 
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#1
Oct1810, 10:57 AM

P: 25

I need to calculate the frequency of sinusoidal vibrations in simple harmonic motion. The only known values that I have are the acceleration amplitude and the vibration amplitude. Is there a way of calculating the frequency of vibration without knowing the period of the oscillations?



#2
Oct1810, 12:12 PM

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P: 6,679

[tex]F = ma = m\ddot{x} = kx[/tex] The general solution is: [tex]x = A_0\sin(\omega t + \phi)[/tex] where [itex]\omega^2 = k/m[/tex] [itex]A_0[/itex] is the maximum amplitude of vibration (maximum x). The maximum acceleration occurs when x = ? What is the acceleration at that point? (hint: use the equation of motion to find maximum value for a). From that you should be able to determine [itex]\omega[/itex] AM 


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