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Yr 10 Physics Ch 8.1

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