R. EXW ΣΗ 2= { 4444 H CHAP 7 74, 799,7 12,711 weer W-150 (366) -3.125 16.67 16 V [ % 31 36 3 160 19.79 125 3.05 625 3 16 So 30 An 53565 GROUP PROBLEM SOLVING Given: Two blocks of different materials are assembled as shown. The densities of the materials are: PA 150 lb/ft³ and P 400 lb/f Find: The center of gravity of this Plan: Solution assembly. Follow the steps for analysis. In this problem, the blocks A and B can be considered as t ieces (or segments).