1. The problem statement, all variables and given/known data http://img813.imageshack.us/img813/594/75309500.png [Broken] http://img813.imageshack.us/img813/7166/51848816.png [Broken] I have to find acceleration to calculate how long it takes the heavier box to reach the end of the table. 2. Relevant equations 3. The attempt at a solution I've tried and the above pictures are my setup.