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An athlete participating in cross-country spends the afternoon practicing, and at the end is completely exhausted from all the hard word, ev
Question
An athlete participating in cross-country spends the afternoon practicing, and at the end is completely exhausted from all the hard word, even though their average velocity during the practice was 0 m/s. Explain how this situation is possible.
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Physics
4 years
2021-08-01T04:35:17+00:00
2021-08-01T04:35:17+00:00 1 Answers
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Answer: please find the answer in the explanation
Explanation:
Velocity is the distance covered in a specific direction per time taken.
And in velocity, we have final velocity V and initial velocity U.
The definition of average velocity is:
Average velocity = (V + U)/2
Since velocity involves direction, if the initial velocity U is of the same magnitude as the final velocity V and both are of opposite direction. Then,
Average velocity = (-U + V)/2
Since they are of the same magnitude,
V = U.
Therefore,
Average velocity = (-U + U)/2 = 0