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chapter 5 vocab
Question | Answer |
---|---|
motion | an objects 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 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 |