There is no such thing as "vacuum force". Vacuum is the absence of matter, and therefore the absence of forces associated with matter, such as pressure, friction, or gravity.

However, there are forces that can be observed in a vacuum:

* Electromagnetic forces: These forces exist between charged particles and are not affected by the presence or absence of matter.

* Gravitational forces: These forces exist between any two objects with mass, and are also not affected by the presence or absence of matter.

* Strong and weak nuclear forces: These forces are responsible for holding the nucleus of an atom together and are also present in a vacuum.

It's important to distinguish between the absence of matter (vacuum) and the absence of forces. While a vacuum lacks the typical forces associated with matter, other fundamental forces still exist within it.