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# ch 3

TermDefinition
Air Resistance Force that opposes the motion of objects that move through the air
Balanced Force Force on an object combine to give a zero net force and dont change the motion of the object
Centripetal Acceleration acceleration of an object toward the center of a curved or circular path
Centripetal force a net force that is directed toward the center of a curved or circular path
First law of motion states that an object moving at a constant velocity keeps moving at that velocity unless an unbalanced net force acts on it and an object at rest stays at rest unless an unbalanced net force acts on it
Second Law of Motion states that the acceleration of an object is in the same direction as the net force on the object, and that the acceleration equals the net force divided by the mass
Friction force that opposes the sliding motion between two touching surfaces
Gravity attractive force between two objects that depends on the masses of the objects and the distance between them
Weight gravitational force exerted on an object
Centripetal acceleration acceleration of an object toward the center of a curved or circular path
Centripetal force a net force that is directed toward the center of a curved or circular path
Third Law of Motion states that when one object exerts a force on a second object, the second object exerts a force on the first object that is equal in strength and in the opposite direction
Momentum property of a moving object that equals its mass times velocity
Force a push or a pull exerted on an object
Net force sum of the forces that are acting on an object
Inertia resistance of an object to a change in its motion