Non-contact forces are forces that act between two objects that are not physically touching each other. Examples of non-contact forces include:
Opposite magnetic poles (N - S or S - N) attract each other:
Like magnetic poles (N - N or S - S) repel each other:
Opposite charges (+ and -) attract:
Like charges (- and -, or + and +) repel:
A gravitational force is experienced by any mass in a gravitational field.
Masses are attracted towards each other by gravitational force: