1. The problem statement, all variables and given/known data http://photo1.ask.fm/723/921/945/-419996993-1shh761-9gamg0f647hgbk/original/IMG_4081.jpg [Broken] There is no friction at all and this is a pulley system. The pulleys and string are mass-less. The numbers correspond to the block weight (ex: 3 = 3kg). 2. Relevant equations F = ma 3. The attempt at a solution From my solutions guide, it seems that the acceleration of block 3 is not equal to the other two blocks. I do not understand this. They are all connected by the same string and therefore are influenced by the same force of tension.