Coulomb vibration response

[ronbak]

I am new to Mathcad Prime and my math skills are a little rusty.  I am trying to get a response plot of a non-linear system with Coulomb friction.  The sign of my velocity changes every half cycle.  I figure I need to do some programming to get my response plot.  I haven't had much success and there aren't too many resources available.  I tried the Help and Tutorials and I still am having trouble.

I was hoping somebody could assist me and also point me to some good resources on programming in Mathcad Prime.

Thanks

[Fred_Kohlhepp]

See attached.

[ronbak]

Fred, Thank you.

I was close but not close enough

Two things:

in the solve block, what does sign do? I assume it returns + or -.   I tried Help but too many sign results came up.

I corrected my equations but can't get the full plot.  I tried a few ways but keep getting errors.  Can you take a look?

Thank you

[Fred_Kohlhepp]

sign is a function that returns the sign (positive or negative) of its argument

Take a look