1. The problem statement, all variables and given/known data The figure shows the dimensions of a composite slab; a fraction of the slab is made of aluminum (density = 2.70 g/cm3) and other part is made of iron (density = 7.85 g/cm3). They are not equal as indicated in the figure, but have x1 = 7.5 cm and x2 = 14.5 cm. As measured from the interface b etween the two metals, where is the center of mass of the slab ( cm)? (Take + toward aluminum with the origin as the midpoint.) 2. Relevant equations density = m/v xcom = (m1x1 + m2x2)/M 3. The attempt at a solution I found the volumes and then the mass of each section. I got the mass of the Iron slab to be 2143g and the mass of the Aluminum slab to 1425.6g. I assumed that the center of mass for each slab would be the middle if it was not connected to the other slab. So I got the center of mass for the Iron slab to be (3.75,6.5) and the Aluminum slab to be (7.25,6.5). Then I used xcom = (m1x1 + m2x2)/M and got around 5.15 cm. That doesnt seem right. Any suggestions?