Contact force:-
Contact force is a force that is applied by objects in contact with each other.
or A contact force is any force that requires contact to occur.
When a body A is in contact with another body B then A can exert a force on B. and B can exert a force on A. These forces are called contact forces.
Example:- Push or pull exerted by a person
1.Normal force
2.Frictional Force
3.Spring Force etc