What is a strong nuclear force and what is a weak nuclear force?

Strong and weak nuclear forces are forces acting inside the atomic nucleus.
The strong force acts between the nucleons to bind them within . Even though the coulombic repulsion between protons exist, the strong interaction binds them together. In fact, it is the strongest of all fundamental interactions know.
Weak forces on the other hand result in certain decay processes in the atomic nuclei. For example, the ##beta##-decay process.