Average velocity for runner covering 28.5m in 11.5s then returning

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daniel20152015
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Homework Statement


I have a problem where a guy runs 28.5m in 11.5s, waits 45s, then runs back to the starting point in 22s. What's the average velocity?

Homework Equations

The Attempt at a Solution


Would it be zero because the displacement is zero or would I calculate the 57 total meters ran divided by the overall time?
 

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daniel20152015 said:
Would it be zero because the displacement is zero or would I calculate the 57 total meters ran divided by the overall time?

Hi Daniel! Welcome to physics forum!:)
The question asks to find the average velocity not average speed. Your answer is correct. As displacement is zero so average velocity is zero. But average speed is not zero.