1. The problem statement, all variables and given/known data At the instant the traffic light turns green, Stan Speedy starts from rest and accelerates at "as". At the same instant Kathy Kool passes Stan with constant velocity "vk". Given: [as, vk] How far beyond the starting point do they meet again? 2. Relevant equations v = v0 + a*t x = x0 + v0t + 0.5 * a * t2 v2 = v02 + 2a(x-x1) 3. The attempt at a solution Stan: x0 = 0 <--- Since he started from rest. x = ? a = as <--- Given v0 = 0 <--- Stan started from rest v = v <----- I think velocity is equal to itself since as, Stan's velocity must be constant too. t = ? First I used v = v0 + a*t to find the time v = (0) + (as * t) t = v/as Now I substitute t into the position formula x = x0 + v0 * t + 0.5 * a * t2 x = 0 + 0 + (0.5 * as * (v/as )2 x = 0.5 * v2/as So now I have Stan's position. Going to list Kathy's variables: x0 = ? <--- from the wording of the prompt I assumed that Kathy has already been running before the green light. x = ? <--- somewhere in front of Stan v = vk <--- Given v0 = ? a = a <--- constant velocity means constant acceleration t = ? So my plan is to find Kathy's position and set it equal to Stan's position and search for the distance of where they meet again. However, I am pretty sure that my setup so far is incorrect. May someone please interject and set me straight?