science ch.2 L.2

Term Definition
force a push or pull on an object
contact force a push or pull applied by one object to another object that is touching it
noncontact force a force that pushes or pulls an object without touching it
friction a contact force that resists the sliding motion between two objects that are touching
gravity a noncontact attractive force that exists between all objects that have mass
balanced forces when the net force on an object is 0 N, the forces acting on it are balanced forces
unbalanced forces when the net force acting on an object is not 0, the forces acting on the object are unbalanced forces.

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