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S8P3.a
Term | Definition |
---|---|
Force | a push or pull exerted on an object in order ton change the motion of the object;force has size and direction |
Motion | an objects change in position relative to a reference point |
reference point | a stationary object that is used to describe an object's motion |
speed | the distance traveled divided by the time interval during which the motion occurred |
velocity | the speed of an object in a particular direction |
acceleration | the rate at which velocity changes over time; an object accelerates if it's speed, direction, or both change |