What is a force? Explain in detail with examples and pictures, diagrams.

A Force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. When the interaction ceases, the two objects no longer experience the force. Forces only exist as a result of an interaction.

a man pushing an object  here a contact exist between man and object


2.
here a man climbing , also contact exists and force is exists