Contact force:

A contact force is a force that acts on an object through direct physical contact with another object.

1. Normal Force: The force exerted by a surface that supports the weight of an object resting on it.


2. Frictional Force: The force that opposes the motion of objects sliding or rolling over each other.


3. Tension Force: The force transmitted through a string, rope, or cable when it is pulled tight.


4. Applied Force : A force exerted on an object by a person or another object through direct contact.

A non-contact force is a force that acts between objects even when they are not physically touching each other.

Examples include:

1. Gravitational Force: The force of attraction between two masses, such as the Earth pulling objects toward it.


2. Electromagnetic Force : The force between charged particles, including both electric forces (attraction or repulsion between electric charges) and magnetic forces (attraction or repulsion between magnetic poles).


3. Nuclear Force : The force that holds the particles (protons and neutrons) together in the nucleus of an atom.