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The stylus of a phonograph record exerts a force of 7.7 x 10-2N on a groove of r...



Dicussion (1)

  • Pressure, \(P = \cfrac{F}{A}\)
    \(= \cfrac{F}{\pi r^2}\)
    \(= 7.7 \times 10^{-2}\)
    \(\pi \times (10^{-5})^2\)
    \(= 7.7 \times 10^{-2}\)
    \(\pi \times 10^{-10}\)
    \(= 2.45 \times 10^8\) Nm\(^{-2}\)

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