Plots with force units not correct

[ahakim98006]

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/getfil...a393-c5e9f5ef8965&file=force_plot_problem.pdf

 

[IRstuff]

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

 

[ahakim98006]

Thank you for your response. I tried using x/mm for the range variable but saw no change. Its strange because the kg/mm function plot works just fine without modifications to the range variable.

I attached the actual mathcad file this time.

 

[IRstuff]

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

 

[israelkk]

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.

 

[ahakim98006]

Ok, thank you everyone.