1. The problem statement, all variables and given/known data The 4 black bars have constant linear density. In terms of L, find the coordinate of the center of mass 2. Relevant equations M0 X = summation of (MiXi) 3. The attempt at a solution I understand most of the solution, except the answer key says one thing I don't get M/sqrt(2) at (L/4, L/4) and at (L/4, 3L/4). Why is there less mass in the middle of bar though the bar is uniform?