You have a puley on which a light string passes. At one end ofthe string a mass of 5 Kg is attached and on the other end another pulley of mass 1 Kg is attached. A second light string passes over this second pulley. At the extremities of this string two masses of 2 and 1 Kg are attached. Calculate the accelerations of the masses and the tension in the two strings. I attempted this problem, solving a system of 4 equations: pulley: 1(9.8)-(T1-T2)= a 5Kg mass: 5(9.8)-T1=-5a 1Kg mass: 1(9.8)-T2=-(f-a) 2Kg mass: 2(9.8)-T2=(f+a) where a=acceleration of 5 Kg mass F=acceleration of the 1 and 2 Kg masses relative to the second pulley T1= tension in the first string T2 Tension in the second string Where is my mistake?