**False**

Friction is a type of force that opposes the relative motion between two surfaces in contact. It acts parallel to the surface and opposes the motion or tendency of motion between the surfaces. Therefore, friction is an example of a contact force, not a non-contact force.

Friction can occur between solid surfaces, such as when you try to slide a heavy box across the floor. It can also occur between a solid and a fluid, such as air resistance when an object moves through the air. In both cases, the surfaces must be in contact for friction to occur.

**Contact Forces vs Non-Contact Forces:**

Contact forces are those forces that require direct contact between two objects or substances for them to occur. Examples of contact forces include friction, normal force, tension force, and applied force. These forces are exerted through physical contact between the objects involved.

On the other hand, non-contact forces are forces that act on an object without any direct physical contact. These forces can act over a distance and do not require any physical contact between the objects involved. Examples of non-contact forces include gravitational force, magnetic force, and electrostatic force.

**Explanation:**

Friction is a contact force because it requires the surfaces of two objects to be in contact in order to occur. When two surfaces are in contact, the microscopic irregularities on the surfaces interact with each other, causing resistance to motion. This resistance is what we experience as friction.

For example, if you try to slide a heavy box across the floor, the roughness of the floor and the box's surface interact, creating friction that opposes the motion. If there was no contact between the box and the floor, there would be no friction and the box would easily slide without any resistance.

Therefore, since friction requires contact between surfaces to occur, it is not an example of a non-contact force but rather a contact force.