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    Damped Pendulum Example

    The motion of a damped pendulum (i.e., a pendulum with friction slowing it) is described by a periodic function (cosine) whose amplitude decreases as time increases in proportion to a negative exponential function. The initial trial values for the parameters are specified on the Parameter statements.

    Title "Damped pendulum motion";
    Variables Time,X;
    Parameter A = 90;
    Parameter alpha = .0008;
    Parameter w = .005;
    Parameter beta = 125;
    Parameter Phase = 0;
    Function X = A*exp(-alpha*Time)*cos(w*(Time-Phase))+beta;
    [ data goes here ]

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