What are the advantages of knowing distance and displacement of an object that is in motion?
Answers
Why the Distinction Matters
Distance traveled is needed to calculate average speed (i.e., total distance over a period of time). ... Displacement is needed to find the final position of an object; it tells not only the distance from the starting position, but also the net direction of travel.
Distance traveled is needed to calculate average speed (i.e., total distance over a period of time). Both distance and speed are scalar quantities, so they are naturally found together. Displacement is needed to find the final position of an object; it tells not only the distance from the starting position, but also the net direction of travel.
Because displacement is a vector quantity, it, not distance, must be used to find average velocity, another vector quantity. Average velocity is the total displacement of an object over a period of time. If you ride your bicycle around an oval for an hour and cover 20 miles, your average speed is 20 mi/hr, but your average velocity is zero because of the lack of displacement from your starting position.
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