The only force that requires contact and cannot act at a distance is the contact force.

Here's why:

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

* Normal force: The force that supports an object against gravity.

* Friction: The force that opposes motion between surfaces in contact.

* Tension: The force transmitted through a rope, string, or cable when pulled.

* Applied force: A force applied directly to an object.

* Non-contact forces act on objects without direct contact. Examples include:

* Gravitational force: The force of attraction between objects with mass.

* Electromagnetic force: The force between charged particles, which includes electric and magnetic forces.

* Strong nuclear force: The force that holds protons and neutrons together in the nucleus of an atom.

* Weak nuclear force: The force responsible for radioactive decay.