1. The problem statement, all variables and given/known data problem in attachment 2. Relevant equations F= MA 3. The attempt at a solution for m2: F= ma = T + m3g - m2g T = -m3g + m2g for m1: T = m1a a = T/m1 plug in: a = (-m3g + m2g)/ m1 All 3 blocks: F = (M + m1 + m2 + m3)a final answer: F = (M + m1 + m2 + m3)[(-m3g + m2g)/ m1] So yea, I'm thinking this is wrong. Any advice on how to solve this would be appreciated.