1. The problem statement, all variables and given/known data You are traveling at a constant speed vM, and there is a car in front of you traveling with a speed vA. You notice that vM>vA, so you start slowing down with a constant acceleration a when the distance between you and the other car is x. What relationship between a and x determines whether or not you run into the car in front of you? 2. Relevant equations x = v0*t - 1/2*a*t^2 3. The attempt at a solution After a time t, the distance between the cars must be something larger than x if they don't want to crash, so: vM*t-1/2*a*t^2 - vA*t > x t(vM-1/2*a*t-vA)>x (vM-vA-1/2*a*t)>x/t What should be the next step after this?