Contact forces are forces that occur when two objects are physically touching. Here are some examples:
* Normal force: The force exerted by a surface perpendicular to the contact point. For example, the force a table exerts on a book resting on it.
* Frictional force: The force that opposes motion between two surfaces in contact.
* Applied force: A force directly applied to an object, like pushing a box.
* Tension force: The force exerted by a string, rope, or cable when pulled taut.
* Air resistance: The force exerted by the air on a moving object.
Non-contact forces are forces that occur even when two objects are not physically touching. These include:
* Gravitational force: The force of attraction between any two objects with mass.
* Electromagnetic force: The force that governs interactions between electrically charged particles. This includes forces like magnetism.
* Nuclear force: The force that holds the nucleus of an atom together.
Therefore, "touching forces" could be interpreted as contact forces, but it's important to use the proper scientific terminology to avoid confusion.
