Here are some examples of contact forces:
* Normal force: The force that a surface exerts on an object that is resting on it.
* Frictional force: The force that opposes the motion of an object in contact with a surface.
* Tension force: The force that is transmitted through a string, rope, cable, or similar object when it is pulled tight.
* Applied force: Any force that is applied to an object by a person or another object.
* Air resistance: The force that opposes the motion of an object through the air.
In contrast to contact forces, there are also non-contact forces that can act on an object without direct contact, such as:
* Gravitational force: The force of attraction between any two objects with mass.
* Electromagnetic force: The force that acts between electrically charged particles.
* Nuclear force: The force that holds the nucleus of an atom together.
