1. The problem statement, all variables and given/known data A dockworker applies a constant horizontal force of 83.0 to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 10.0 in a time 5.30 . If the worker stops pushing at the end of 5.30 , how far does the block move in the next 4.20? 2. Relevant equations d=v(i)t+.5at^2 a=(vf-vi)/t 3. The attempt at a solution I solved Vi by dividing distance/time, and then solved for acceleration (-.449235) by dividing (Vf-Vo)/t with Vf=0 and Vi=1.88. I used 4.20 as "t". I plugged the results into d=v(i)t+.5at^2 and got 3.96 as an answer, however masteringphysics said I was wrong. What am I doing wrong??