What is the definition of dispersion forces?

Forces can vary depending on the field of Physics in which it is applied. However the SI newton for all forces is the Newton (N). The most common usage of the word 'force' is in Mechanics to...

when two forces of applied on an object and the forces are not equal; the force on one side is greater than the other, this is called an unbalanced force

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A contact force is any force applied to an object by another body that is in direct contact with it. Ex-Friction and Muscular force.

As far as I can tell, there is only one definition of force from the standpoint of physics. Force is a vector quantity, meaning it has direction as well as magnitude. A force is that which changes...