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Ch. 5 Vocab

Physical Science

QuestionAnswer
motion an object's change in position relative to a reference point
speed the distance traveled divided by the time interval during which the motion occured
velocity the speed of an object in a particular direction
acceleration the rate at which velocity changes over time; an object accelerates if its speed, direction, or both change
force a push or pull exerted on an object in order to change the motion of the object; force has size and direction
newton the SI unit for force (symbol, N)
net force the combination of all the forces acting on an object
friction a force that opposes motion between two surfaces that are in contact
gravity a force of attraction between objects that is due to their masses
weight a measure of the gravitational force exerted on an object; its value can change with the location of the the object in the universe
mass a measure of the amount of matter in an object
Created by: lwrt666
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