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Chapter 3 Vocabulary
Chapter 3Vocabulary
Term | Definition |
---|---|
Force | A push or pull. |
Net Force | The sum of all the forces acting on an object. |
Friction | The force that opposes the sliding motion of two surfaces that are touching each other. |
Gravity | An attractive force between any two objects that depend on the masses of the objects and the distance between them. |
Weight | The gravitational force exerted on an object. |
Newton's First Law of Motion | States that an object moves at a constant velocity unless an unbalanced force acts on it. |
Inertia | The tendency of an object to resist any change in its motion. |
Newton's Second Law of Motion | States an object's acceleration is in the same direction as the net force on the object and is equal to the net force exerted on it divided by its mass. |
Newton's 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 that is equal in strength and opposite in direction. |
Air Resistance | A friction-like force that opposes the motion of objects that move through the air. |
Terminal Velocity | The maximum speed an object will reach when falling through a substance, such as air. |
Free Fall | If gravity is the only force acting on an object, it is in this. |
Centripetal Force | A force exerted toward the center of a curved path. |
Law of Conservation of Momentum | If no external forces act on a group of objects, their total momentum does not change. |