* Contact forces: These forces occur when two objects touch. Examples include:

* Normal force: The force that supports an object against gravity, like the force a table exerts on a book placed on it.

* Friction force: The force that opposes motion between two surfaces in contact, like the force you feel when pushing a heavy box across the floor.

* Tension force: The force that pulls on an object, like the force in a rope when you are pulling on it.

* Applied force: A force applied directly to an object, like the force of your hand pushing a door.

* Non-contact forces: These forces occur between objects that are not touching. Examples include:

* Gravitational force: The force of attraction between any two objects with mass, like the force that pulls you towards the Earth.

* Electromagnetic force: The force that governs the interactions between electrically charged particles. This includes forces like magnetic forces and electric forces.

* Weak force: A force that is responsible for radioactive decay.

* Strong force: The force that holds the nucleus of an atom together.

It's important to note that some sources might categorize forces differently. For example, they might group all forces that act over a distance (like gravity and magnetism) as "field forces." Regardless of how they are categorized, these are the fundamental types of forces that govern the interactions in the universe.