This value has the form [] Length, but must have the form [] Unitless

[ptc-5114982]

I got the error message like this in discussion title, when i try to solve simply differential equation.

Check the attached file.

[MikeArmstrong]

Try removing all the units.

Mike

[ptc-5114982]

I have tried it before, and its working, but i would like to solve this equatation with units.

Is there any posibility to do this ?

[Werner_E]

Not really satisfactory, but maybe like in the attached file

[ptc-5114982]

Thanks alot. I have one more question, how to find minimum of function, without calculating derivative of a function ? Is there any built-in mathcad function to find it ?

[Werner_E]

You could use minimize() or you could make vectors with x and y values and use min() and match() or lookup().

See attached