Question

what are contact and non contact forces ? give examples of each ?

Answer 1

contact forces means which are contact with each other without any physical contact

Answer 2

Contact force :  A contact force is any force that requires contact to occur. Contact forces are ubiquitous and are responsible for most visible interactions between macroscopic collections of matter. Pushing a car up a hill or kicking a ball or pushing a desk across a room are some of the everyday examples where contact forces are at work.
Example : Pushing a car up a hill or kicking a ball or pushing a desk across a room

Non Contact force : A non-contact force is a force which acts on an object without coming physically in contact with. The most familiar example of a non-contact force is weight. In contrast a contact force is a force applied to a body by another body that is in contact with it.
Example : Gravitational force.
Magnetic force.
Electrostatics.
Nuclear force.