Question

A person travels by car from Tucson to Phoenix at a constant speed of 75 km/hr. They then return from Phoenix to Tucson at a constant speed of 65 km/hr. What was their average velocity?

Answer 1

`v=0`

Step-by-step explanation:

Knowing that the formula for average velocity is:

`v=(x_(2)-x_(1))/(t_(2)-t_(1))`

Being said that, we know that the person's displacement is zero because it returns to its starting point

`x_(2)=x_(1)`

That means
`x_(2)-x_(1)=0`

`v=(0)/(t_(2)-t_(1))=0`