I'd fancy to use XeLaTeX with the font Cascadia Cod3 but the standard math font is not up to the task.
Is it possible to use a different, better matching math font or, as a second option, manipulate the default math font to increase a little bit its size and weight?
A minimal example, showing the poor match between Cascadia Cod3:
\documentclass[10pt]{article}
\usepackage{unicode-math,siunitx,xcolor}
\setromanfont{Cascadia Cod3}
\begin{document}
\section*{Impulsive Load}
We can compute the total impulse using the trapezoidal rule,
{\small
\begin{align*}
m\Delta\dot{x} &\approx
\SI{0}{\kilo\newton}\cdot\SI{10}{\milli\second} +
\SI{40}{\kilo\newton}\cdot\SI{20}{\milli\second} +
\SI{50}{\kilo\newton}\cdot\SI{20}{\milli\second} +
\SI{30}{\kilo\newton}\cdot\SI{20}{\milli\second} +
\SI{0}{\kilo\newton}\cdot\SI{10}{\milli\second} \\
&=
\SI{2400}{\newton\second}=\SI{2400}{\kilo\gram\metre\per\second}.
\end{align*}
}
\end{document}


mathastextpackage to use characters from your text font in math, see e.g. https://tex.stackexchange.com/questions/668939/change-math-font-to-arial/668942#668942 for an example how to use this with fontspec. – samcarter_is_at_topanswers.xyz Feb 13 '23 at 21:25