1. The problem statement, all variables and given/known data The mobile is in equilibrium. The fish B weighs 27 oz. Determine the weights of fish A, C and D. (The weights of the crossbars are negligible). 2. Relevant equations Moment = Force*Distance 3. The attempt at a solution My idea here is to use the moments about each point, solve for one variable. Here is what I have com up with so far, am I on the right track? D(14)=A(4) since their moments at that point are in equilibrium. B(4)=12(A+D) C(24)=6(A+B+D) Am I wrong in setting it up this way?