What is the requirement for a force to come into play?
What is the magnitude of the resultant force when two forces act in same direction?
What will be the magnitude of the resultant force when two forces act in opposite directions on an object?
What happens in a game of tug of war, when two teams pull equally hard?
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The forces acting on two or more objects from a distance without making contact on any of the objects, are called non-contact forces. Examples: Gravitational force, magnetic force and electrostatic force.