Answer:
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.
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.
Explanation:
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