I don't require an answer to the problem itself, but rather a method I can use to solve it: 1. The problem statement, all variables and given/known data You spot a deer down the road, so you brake to stop before hitting the deer. If your initial speed was 23m/s, what was your average velocity during braking? Deceleration was constant throughout braking. 2. Relevant equations v=d/t a=v/t 3. The attempt at a solution I can't even begin to solve it, because I'm pretty sure I require an additional piece of data, such as the stopping distance, or the magnitude of the deceleration. Is there a way to solve it without this data? Any help would be greatly appreciated!