* Gravitational force: This is the force of attraction between any two objects with mass. The more massive the objects, the stronger the gravitational force. This is what keeps us on the ground and what causes the planets to orbit the sun.
* Electromagnetic force: This force acts between electrically charged objects. There are two types of electromagnetic forces:
* Electric force: This force exists between stationary charges. Like charges repel, and opposite charges attract.
* Magnetic force: This force acts between moving charges. Magnets create magnetic fields, and these fields can exert forces on other magnets or on moving charges.
* Weak nuclear force: This force is responsible for radioactive decay, a process where an unstable nucleus releases energy. It is a short-range force that operates within the nucleus of an atom.
* Strong nuclear force: This force binds protons and neutrons together to form the nucleus of an atom. It is also a short-range force that operates within the nucleus of an atom.
It's important to note that even though these forces act at a distance, they are still mediated by particles. For example, the gravitational force is mediated by gravitons, while the electromagnetic force is mediated by photons.
