1. The problem statement, all variables and given/known data Calculate the weight of each member of the truss structure. 2. Relevant equations density = mass/volume 3. The attempt at a solution This is part of a lab that we are doing in my mechanics of materials course. I have designed a structure, and I must calculate the weight of each member. In short, we have been given density, the cross-sectional area of each member, and the diagram of the structure (and thus length of each member). Volume is in in3 and density is in lb/in3 So what I have done so far is: 1) Calculate the volume of each member by multiplying the length by its cross-sectional area. 2) Calculate the mass of each member by multiplying the volume by density. My question is, when the units cancel I am left with lbs. for the unit of mass. Is this the weight? Or do I need to multiply it by 32.2 ft/s2?