1. Contact Forces: These forces require direct physical contact between objects. Examples include:

* Normal Force: The force exerted by a surface on an object in contact with it (like a table supporting a book).

* Friction Force: The force that opposes motion between two surfaces in contact (like the force that slows down a sliding book).

* Tension Force: The force exerted by a stretched rope, cable, or string (like pulling a toy with a string).

* Applied Force: A force applied directly to an object (like pushing a door).

2. Non-Contact Forces: These forces act on objects without direct physical contact. Examples include:

* Gravitational Force: The force of attraction between any two objects with mass (like the Earth pulling you towards its center).

* Magnetic Force: The force exerted by magnets on each other or on magnetic materials (like a magnet attracting a paperclip).

* Electrostatic Force: The force exerted between electrically charged objects (like static electricity making your hair stand on end).