# chapter 8 terms

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1. Speed
distance traveled divided by the time interval during which the motion occurred
2. Velocity
quanity decribing both speed and direction
3. Momentum
a quantity defined as the product of an object's mass and its velocity
4. Acceleration
change in velocity divided by the time interval in which the change occurred
5. Force
the cause of acceleration, or changein an object's velocity
6. Balanced Forces
forces acting on an object that combine to produce a net force equal to zero
7. Unbalanced Forces
forces acting on an object that combine to produce a net nonzero force
8. Friction
the force between two objects in contract that opposes the motion of either object
9. Gravity
the force of attraction between two particles of matter due to their mass
10. Inertia
the tendency of an object to remain at rest or in motion with a constant velocity
11. Free Fall
the motion of a body when only the force of gravity is acting on it
12. Terminal Velocity
the maximum velocity reached by a falling object that occurs when the resistance of the medium is equal to the force due to gravity

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 Author: Anonymous ID: 67283 Filename: chapter 8 terms Updated: 2011-02-18 16:48:58 Tags: motion Folders: Description: motion Show Answers:

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