* Gravitational: The force of attraction between any two objects with mass. This is the weakest force but acts over the largest distances.
* Electromagnetic: The force between electrically charged particles and magnets. It's responsible for most everyday phenomena like friction, light, and chemical reactions.
* Strong Nuclear: The force that binds protons and neutrons together in the nucleus of an atom. It's the strongest force, but acts only over extremely short distances.
* Weak Nuclear: The force responsible for radioactive decay. It's weaker than the strong force and acts over even shorter distances.
These four fundamental forces govern all interactions in the universe.
In simpler terms:
Forces are like pushes or pulls. They happen whenever two things bump into each other, get close enough to feel each other's magnetism, or when one thing is heavy and pulls on another. The four types of forces just describe the different ways things can interact.