Find the weight and z-axis center of gravity of the composite body shown in Figure 6.1. The body is defined by three prisms of square base of side d = 2 m. The specic weight (unit weight) are as follows: 71 =1500 N/ma, yz =1300 N/mg, 73 =1000 N/m3 . Z '1' I I I I I Figure 6.1