A force acting between two bodies in contact is called a contact force.
A contact force arises when an object is in contact with some other object. Whenever two objects are in contact, mutual contact forces exist that satisfy Newton’s Third Law of Motion. The origin of these forces can be explained in terms of the fundamental properties of matter. Examples: push, pull, the tension of a string, normal force, the force of friction, etc.
- The interactive forces when the two objects are apart, non-contact forces, described as action at a distance force.