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## Homework Statement

A particle moving at 5 m/s reverses its direction in 1s to move at 5 m/s in the opposite direction. If is acceleration is constant, what

**distance**does it travel?

## Homework Equations

The constant acceleration equations

## The Attempt at a Solution

I use x=v

_{o}t + 1/2at

^{2}were a= (v

_{final}- v

_{initial})/t. I get the wrong answer. Something about having to plug in half the time for some reason that I don't understand. Would some one please help me out?