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Science Final
Ch. 12 Vocabulary
7
Science
8th Grade
05/12/2009

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Term
motion
Definition
an object's change in position relative to a reference point
Term
average speed
Definition
the total distance traveled divided by the total time taken
Term
velocity
Definition
the speed of an object in a particular direction
Term
acceleration
Definition
the rate at which velocity changes over time; an object accelerates if its speed , direction, or both change
Term
force
Definition
a push or pull exerted on an object in order to change the motion of the object; force has size and direction
Term
newton
Definition
the SI unit for force (symbol, N)
Term
net force
Definition
the combination of all of the forces acting on an object
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