[SOLVED] Acceleration/Velocity Problem 1. The problem statement, all variables and given/known data In an historical movie, two knights on horseback start from rest 78.0 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.257 m/s2, while Sir Alfred's has a magnitude of 0.389 m/s2. Relative to Sir George's starting point, where do the knights collide? 2. Relevant equations x= V(0)t+ (1/2)at^2 Average Acceleration Average Velocity 3. The attempt at a solution Ok I'm first of having trouble finding out where to START in this problem. I decided the best move would to use x= V(0) + (1/2)at^2 to find out how long it would take the two horseback riders to cross all 78 m. I got t= 24.64 seconds for George and t= 20.03 seconds for Alfred What I'm having trouble doing now is setting up an equation that would allow me to figureout when the two riders crashed into each other. Any thoughts?