Here are some examples of contact forces:
* Normal force: The force that a surface exerts on an object that is resting on it.
* Friction: The force that opposes the motion of two surfaces that are in contact.
* Tension: The force that is transmitted through a rope, string, or cable.
* Air resistance: The force that opposes the motion of an object through the air.
* Applied force: The force that is exerted on an object by a person or another object.
It's important to note that contact forces are distinct from non-contact forces such as gravity, magnetism, and electrostatic forces, which can act on objects even when they are not touching.
