Which term is a type of 3D CAD modeling that represents the volume of an object, not just its lines and surfaces, allowing analysis of mass properties?

Which term is a type of 3D CAD modeling that represents the volume of an object, not just its lines and surfaces, allowing analysis of mass properties?

• A. Solid Modeling
• B. Mathematical Modeling
• C. Physical Model
• D. Scale Model

Answer: (A)

In CAD, estimating mass properties relies on representing the object as a solid with volume. Solid modeling creates a complete, enclosed 3D region that carries volume, surface, and topology information, letting you compute mass, center of gravity, moments of inertia, and other properties by multiplying volume by density. This is why it’s the best fit for describing a model you can analyze for mass properties. Other terms don’t capture this volumetric, property-ready aspect. Mathematical modeling focuses on equations and abstractions rather than a concrete CAD geometry; a physical model is a tangible object; a scale model is a smaller replica.

In CAD, estimating mass properties relies on representing the object as a solid with volume. Solid modeling creates a complete, enclosed 3D region that carries volume, surface, and topology information, letting you compute mass, center of gravity, moments of inertia, and other properties by multiplying volume by density. This is why it’s the best fit for describing a model you can analyze for mass properties.

Other terms don’t capture this volumetric, property-ready aspect. Mathematical modeling focuses on equations and abstractions rather than a concrete CAD geometry; a physical model is a tangible object; a scale model is a smaller replica.