Prompt Title: A bit more research

There are four fundamental forces that govern the behavior of matter at the atomic and subatomic scale:

1. Strong nuclear force: This force is responsible for holding the protons and neutrons together in the nucleus of an atom. It is the strongest of the fundamental forces, but it operates only over very short distances, typically on the order of the size of a nucleus.

2. Weak nuclear force: This force is responsible for some forms of radioactive decay and neutrino interactions. It is much weaker than the strong nuclear force and operates only over very short distances.

3. Electromagnetic force: This force is responsible for the interactions between charged particles, such as electrons and protons. It is much stronger than the weak nuclear force and operates over much larger distances. It is the force that prevents two objects from interlocking when they come into contact, as the repulsion between the negatively charged electrons in each object creates a force that pushes the objects apart.

4. Gravitational force: This force is responsible for the attraction between objects with mass. It is the weakest of the fundamental forces and operates over very large distances, but it is still important for the behavior of matter at the macroscopic scale.

Overall, it is the interplay between these fundamental forces that determines the behavior of matter at the atomic and subatomic scale. When two objects come into contact, the electromagnetic force is the dominant force preventing them from interlocking with one another, due to the repulsion between the electrons in the outermost shells of the atoms.