1. The problem statement, all variables and given/known data Blocks of 1.0, 2.0, and 3.0 kg blocks are lined up on a table (1kg block being on the left, 2kg in the middle, 3kg being on the right). A rightward poiting 12 N force is applied to the leftmost block. What force does the leftmost block exert on the middle one? 2. Relevant equations F=ma a= Force applied / (m1 + m2 +m3) a= 12N/6k= 2m/s^2 3. The attempt at a solution Ok so this is what I did: 12N + F(1on2)=(mass of 2nd block)(acceleration) 12+F(1on2)=(2kg)(2m/s^2) F(1on2)=8N, I got this wrong. Did i miss something, or should this force actually be negative.