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Answer :
Final answer:
Velocity, a vector quantity involving both magnitude and direction, results in the average velocity being zero for an object that returns to its starting point.
Explanation:
In the realm of Physics, especially in the concepts related to motion, velocity is a vector quantity, meaning it takes into account the magnitude and direction both of the moving object. In this case, the object moves from A to B and then returns from B to A. Because the object ends up at the same point where it started, the displacement (which is total path length covered in a given direction) is zero.
As velocity is defined as displacement divided by time, and in this case displacement is zero, the average velocity of the object for the whole journey, regardless of its speed, is also zero (D).
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