Hello to all
I solved this differential equation:

I wanted to know if the procedure I used is correct…
this is the .sm file… vel-imb.sm (25 KiB) downloaded 33 time(s).
Thanks in advance

Wrote

I wanted to know if the procedure I used is correct…

Maybe it is correct. The solver you use is transmitted Unicode ?
not digestible as is. Why not stay Native Smath ODE Solver(s) ?
... as doctored/attached SS 6179

vel-imb Doctored Native Smath ODE solver(s).sm (26 KiB) downloaded 49 time(s).