1. The problem statement, all variables and given/known data In terms of m1,m2, and g. find the acceleration of the hanging block in the two-block/ two-pulley setup shown in the diagram. The stands holding the string rests on the floor. All pulleys are massless, and there is no friction anywhere in the system. 2. Relevant equations F=ma 3. The attempt at a solution First I drew free body diagrams of both blocks and of the lower pulley. I numbered the tensions in the pictures. The equations that I got for m1: Fy= N=mg Fx= T1=m1a For m2 I got: Fy= T2-m2g=-a*m2 For pulley I got: T1+T3=T2 Then I substituted T2 Into the equation for m2 and I got: T1+T3-m2g=-a*m2 m1*a+T3-m2g=-a*m2 Now I am confused but I decided to call T3 just T because T is same in the rope. As a result my answer is a= (m2g-T)/(m2+m1), but it is probably wrong. Could you please check if I am on track here? Thanks for the help!