1. The problem statement, all variables and given/known data Determine a formula for acceleration of the system shown in Fig. 4-45 if the cord has a non-negligible mass mc. Specify in terms of lA and lB, the length of cord from the respective masses to the pulley ( The total cord length is l= lA + lB) [PLAIN]http://img706.imageshack.us/img706/8575/3333v.png [Broken] 2. Relevant equations F = ma 3. The attempt at a solution Fby = Fax Fby = mB *g acceleration of system: a = (mB *g)/ma acceleration of system with non-negligible cord a = (mB + (mC * (lB/ l)))*g / (ma + (mC * (lA/ l))) need an answer check, I can't tell if its right.