1. The problem statement, all variables and given/known data A hockey puck sliding on a frozen lake comes to rest after traveling 249 m. If its initial velocity is 4.5 m/s, what is its acceleration if that acceleration is assumed constant? 2. Relevant equations V(t)= v(initial) + at d= v(initial)*t + .5at^2 3. The attempt at a solution V(t)= 4.5 m/s + at or 249 m= 4.5 m/s*t + at^2 I'm confused as to where to go from here. How can I go about finding t, so that I can find a? Or am I trying to go about it wrong?