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Re: Simple equation won't plot


Bert Aerts (rm x) wrote:
> When I type following commands in Mathematica 6.0.1:
> m = 70; a = 0.08; x0 = 5000; g = 9.81;
> x[t_] = x0 - m*Log[Cosh[t*Sqrt[g*a]/Sqrt[m]]]/a;
> P1ot[x[t], {t, 0, 60}]
> I don't get a plot, but instead:
> P1ot[5000 - 875. Log[Cosh[0.105884 t]], {t, 0, 60}]

Try fixing the typo. You have a numeral one instead of the letter l in Plot.

> Why is t_ used in the second equation?

This identifies t as an argument in the function.

-- 
Helen Read
University of Vermont


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