1. The problem statement, all variables and given/known data A person runs in front of you. The person accelerates uniformly from 4.0 m/s to 8.0 m/s in a time of 4.0 s. What is the magnitude of the acceleration of the person during the 4.0 s? 2. Relevant equations Kinematics 3. The attempt at a solution Vfx = Vox + at (Vfx - Vox)/t = a so (8m/s - 4m/s)/(4s) = a = 1.0 m/s^2 this is wrong though, so what am i failing to understand here?