http://img329.imageshack.us/my.php?image=serway5e1619asinbookjn5.jpg" How do we determine the tension of the string in the middle of the two objects? Let the tensions be T_1, T_2, and T_3, left to right: I tried [tex]\sum F_x = T_2 - \cos \theta T_1 = 0[/tex] [tex]\sum F_y = \sin \theta T_1 - mg = 0[/tex] for the other object it is similar. Is there something wrong with this? I can calculated T_2 without regard to the other object. Should I not include both the objects in F_y? thanx!