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Plots with force units not correct

Plots with force units not correct

Plots with force units not correct

(OP)
I am having an issue with plots. If I write a function that uses units of force the function evaluates correctly but the plot does not. If I use mass units both work fine. Attached is a pdf sample of my problem.

I have set the units system to custom, based on SI, with the length unit changed to mm.

Thanks for any help.

http://files.engineering.com/getfile.aspx?folder=fe5ab0bf-f433-4f28-a393-c5e9f5ef8965&file=force_plot_problem.pdf

RE: Plots with force units not correct

The actual Mathcad file would be more useful.  However, I can say that Mathcad's plot function reverts to default units when plotting, so you need to normalize to the desired unit in the actual plot variable placeholder, i.e., plot v(x) vs x/mm, not x  

TTFN

FAQ731-376: Eng-Tips.com Forum Policies

RE: Plots with force units not correct

I don't have M14, but I assume that you probably need to normalize V(x) as well.  Neither M11 nor my other version have a problem with plotting the graph

TTFN

FAQ731-376: Eng-Tips.com Forum Policies

RE: Plots with force units not correct

As IRstuff said you need to normalize the V(x) too. However, "kg" in Mathcad is not force it is mass. You either use "N" or use "kgf" in the V(x) function definition.  

RE: Plots with force units not correct

(OP)
Ok, thank you everyone.

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