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Chapter 5 - PS
Chapter 5 Vocabulary - Matter in Motion
Word | Definition |
---|---|
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 occurred |
velocity | the speed of an object in a particular direction |
accleration | 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 an object; force has size and direction |
newton | the SI unit for force (symbol, N) |
net force | the combination of all forces acting on an object |
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 object in the universe |
mass | a measure of the amount of matter in an object |