1. The problem statement, all variables and given/known data http://img370.imageshack.us/img370/9488/96191446sb5.jpg [Broken] Evaluate Ax, the x-component of the acceleration between M and S. 2. Relevant equations a=x/t^2 3. The attempt at a solution M= 48 m at 8.5 s S= 40 m at 11.5 s so change of x=-8 m, and change of t = 3s so a= -8 / (3^2), so -8/9 m/s^2 (or -0.889 m/s^2). Where did I go wrong?