Question

you travel in a circle, whose circumference is 8 kilometers, at an average of 8 kilometers/hour. if you stop at the same point you started from, what is your average velocity?

Answer 1

The average velocity is zero

Explanation:

The average velocity of an object is given by:

$v=\frac{d}{t}$

where

d is the displacement of the object

t is the time interval

The displacement is the distance in a straight line between the initial position and final position of motion.

In this problem, the person is travelling in a circle, and he stops at the same point where he started: this means that the initial position corresponds to the final position, therefore

displacement = 0

And so, the average velocity is also zero:

v = 0

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