Contact force
In physics, a contact force is a force between two objects (or an object and a surface) that are in contact with each other. This is distinct from a force that acts over a distance, such as gravity or magnetic attraction/repulsion.
A contact force has two components. The part of the force that lies within the plane of contact is friction, which must be overcome for the two objects to slide relative to one another along that plane. The part of the force that is perpendicular to the plane of contact is called the normal force. As a consequence of Newton's Third Law, the normal force experience by each object is equal in magnitude.
Strictly speaking, contact forces are only a useful simplification for introductory physics classes and other applications of classical mechanics. Everyday objects on Earth do not actually touch each other; rather contact forces are the result of the interactions of the electrons at or near the surfaces of the objects.