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

## 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?

## 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?

jedishrfu
Mentor
Welcome to PF!

What is the definition of average velocity? Its based on displacement and time so what is it?

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.