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Matter in Motion

Chapter 5 Vocabulary

WordDefinition
motion an object's change in positon relative to a reference point
speed the distance traveled by an object by the time taken to travel that distance
velocity the speed of an object in a particular direction
acceleration the rate at which velocity changes
force a puch or pull on an object
newton the SI unit for force
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 on an object
mass a measure of the amount of matter in an object
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