(Answered) The vertical displacement of a string is given by the

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The vertical displacement of a string is given by the harmonic function: y(x, t) = 6cos (16pt - 20px) (m), where x is the horizontal distance along the string in meters. Suppose a tiny particle were to be attached to the string at x = 5 cm, obtain an expression for the vertical velocity of the particle as a function of time.

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