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Physics homework -- guy runs 28.5m in 11.5s,

  • #1

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?
 

Answers and Replies

  • #2
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Welcome to PF!

What is the definition of average velocity? Its based on displacement and time so what is it?
 
  • #3
591
12
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.
 

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