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Question

# Estimate the fundamental frequency of vibration of a telephone line between adjacent poles near where you live.Explain how you arrived at your answer.

Solution

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We would like to estimate the fundamental frequency $\color{#c34632}f_{1}$ of vibration of a telephone line between adjacent poles.

\line(1,0){370}

Assume that each pole each exerts a $\color{#c34632}180 \mathrm{~ N}$ on the line, and the line has a length of $\color{#c34632}30 \mathrm{~ m}$ and a mass of $\color{#c34632}8 \mathrm{~ kg}$.

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