What term in a physics problem implies that the table is frictionless?

The term "smooth" in a physics context typically indicates that surfaces in contact do not experience friction. When a problem specifies that a table is smooth, it implies that objects resting on it or moving across it will do so without any resistive forces acting against them due to friction. This allows for simpler calculations involving motion since the absence of friction means that the only forces that need to be considered are those directly acting on the objects, such as gravity or applied forces.

In contrast, terms like "even," "flat," or "level" primarily refer to the surface's physical characteristics without necessarily implying anything about the presence or absence of friction. While a smooth surface will often also be flat or level, the crucial aspect in a physics problem regarding friction is the term "smooth."