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13 Cards in this Set
- Front
- Back
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Distance
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a measurement of the total path that an object travels – includes twists and turns – does not include a specified direction.
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Displacement
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a straight line measurement of the distance separating and object from where it started to where it finished – includes a specified direction.
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Scalar quantity
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a quantity such as distance or time that has size but not a direction.
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Vector quantity
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a quantity, such as displacement or velocity that has both size and direction.
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Reaction time
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the length of time it takes a driver to respond to a hazard/emergency
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Reaction distance
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the distance moved while reacting to a hazard/emergency
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Speed
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the rate of change of distance (scalar)
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Velocity
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the rate of change of displacement (vector)
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Instantaneous speed
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the speed of an object at a particular time.
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Error
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the difference between the value that is measured and the actual measurement.
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Precision
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how close the measure values are to each other.
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Random error
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error that changes unpredictably.
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Systematic error
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error that always differs by the same amount.
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