Why I think we could use this: Adding this feature to fusion would make it so much more powerful. Any sort of ballistic or aerodynamic project would be vastly improved. Designing rockets and engines could be more accurate and let our community get into a whole new level of complexity and quality of design.
What it would need to include: Allowing us to input mechanical properties of the materials we want to work with would be absolutely essential to getting real results. tensile, shear, thermal modulus, etc. would let us see actual pressure and pressure relative to our material capabilities.
Allowing us to use faces and create origins of force and rate of acceleration of said force would also be crucial.
We could use this for hundreds of projects across dozens of industries.