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### 18 Cards in this Set

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• Back
 forces that combine to form a net force of zero balanced force a force that is exerted only when objects are touching contact force an influence tending to change the motion of an object or produce motion in a stationary object force the combination of all the forces acting on an object net force an object at rest will stay at rest or an object in motion will stay in motion unless acted on by a force Newton's First Law of Motion a force exerted when objects are not touching noncontact force forces that combine to form a net force that is not zero unbalanced force a squeezing force applied to an object that can make an object shrink compression force force exerted by a material when it is stretched or compressed elastic force a contact force that opposes the movement between two surfaces in contact friction an attractive force between all objects that have mass gravity all objects are attracted to each other with a force that depends on their masses and the distance between the objects Law of Universal Gravitation a force exerted by an object perpendicular to the surface of the object normal force pulling force applied to an object that can make an object stretch tension force the gravitational force exerted on an object weight in circular motion a force that acts perpendicular to the direction of motion toward the center of the circle centripital force the acceleration of an object is equal to the net force divided by the object's mass (F=M x A) Newton's Second Law of Motion for every action, there is an equal and opposite reaction Newton's Third Law of Motion