What are the Degrees of Freedom (DOFs) restrained for a Solid?

In the context of solid mechanics and simulations, a solid body in three-dimensional space typically has a total of six degrees of freedom (DOFs). These consist of three translational movements (along the x, y, and z axes) and three rotational movements (about the x, y, and z axes).

When considering how a solid is restrained, it is important to understand that when a solid is fixed in place (for example, in a simulation or real-world application), its ability to move is restricted. However, in the case of a solid, it can freely translate in all three directions. Therefore, when stating that the degrees of freedom restrained involve only translations, it accurately reflects that the solid maintains its ability to move in these translational motions while not allowing for any rotational movement.

Consequently, the answer that states "3 Translations" reflects the ability of the solid to translate freely, while not accounting for its rotational movements, which can often be restrained based on the context of the fixity of the solid.