Here's a breakdown:
1. Simple Particle Models:
* These models don't consider internal motions. They treat objects as point masses with no internal structure.
* They are used for basic simulations where internal details aren't relevant, like calculating the trajectory of a ball.
2. More Complex Particle Models:
* These models can incorporate internal motions. Think of models used in:
* Molecular Dynamics (MD): Here, individual atoms and molecules are treated as particles, and their internal motions are explicitly simulated to understand material properties and reactions.
* Soft Body Physics: In computer graphics, objects are modeled as collections of particles connected by springs or other forces, allowing for realistic deformation and internal movement.
So, the answer is:
* Not always. Simple particle models don't consider internal motions.
* Sometimes. More complex models, like those used in MD and soft body physics, explicitly simulate internal motions.
It's important to understand the level of detail and the specific application when deciding whether or not to include internal motions in your particle model.
