1. The problem statement, all variables and given/known data Two dogs stand facing each other 85 meters apart. They begin to run towards each other. Dog A runs at a constant velocity of 3.5 m/s; Dog B is going the opposite direction at a constant -2.8 m/s. How long before the dogs collide? 2. Relevant equations Xfinal-Xinitial = vt 3. The attempt at a solution I looked through my notes from class and tried to work through it. I also googled it but couldn't figure it out.