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What is the fundamental frequency of the string?

  • Thread starter mattmannmf
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  • #1
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One of the harmonics on a string 1.4 meters long has a frequency of 18.4 Hz. The next higher harmonic frequency is 23.9 Hz.

(a) What is the fundamental frequency of the string?
f1 = Hz *
5.5 OK

(b) What is the speed of the waves on the string?
v = m/sec

the URL:https://wug-s.physics.uiuc.edu/cgi/cc/shell/DuPage/Phys1201/spring/tma.pl?Ch-14-Waves/wt_fundamental#pr [Broken]

I found the frequency, but im just a little confused on how to find the speed. i know i have to use the equation: v=hf. but im just confused on how to find wavelength... wavelength is the distance it takes to complete a full cycle correct? i dont know where im going wrong in my calculations
 
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Answers and Replies

  • #2
dx
Homework Helper
Gold Member
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You know the difference between the frequencies of successive harmonics is 5.5 Hz. This difference is a function of v and L, and you already know L.

(Hint: Use ω = nπv/L, you have to convert the angular frequency here to Hertz)
 
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