Air Resistance - A force that resists an object's motion through air, Applied Force - A force exerted by a person, animal or machine, Balanced Force - A force with an equal and opposite force acting on the same object, Contact Force - Any force that can only occur when two objects are touching, Elastic Force - A force that occurs when a springy object is squashed or stretched. It causes a spring to return to its natural length., Force - A push, pull or twist. An action of one object on another., Friction - A contact force that resists an object's motion, Gravity - A non-contact force that pulls objects to the ground, Magnetic Force - A non-contact force that can be either attractive or repulsive., Net force - The overall force on an object, Newton - The standard unit of force. , Non-contact Forces - Any force that can occur even when two objects are not touching, Force meter (spring balance) - A scientific instrument used to measure forces, Tension - A type of elastic force that pulls inward when a NON-ELASTIC object is stretched, Unbalanced Forces - A force without an equal and opposite force acting on the same object,

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