Center of Mass Derivation..Doubt :( 1. The problem statement, all variables and given/known data Guys,I dont seem to understand how the general equation for Center of mass was derived.I mean,yeah,i get that in a rod,or other symmetric structures,it should lie at the point of symmetry more or less,How waz the general equation derived?m1r1+m2r2+m3r3+....mn rn/m1+m2+m3...etc??..What does the term m1r1 actually mean??:( 2. Relevant equations McmRcm = m1r1+m2r2+m3r3.......+mnrn 3. The attempt at a solution:Lets say, i can plug and chug the equation to get an answer to score at test and stuff,but just dont understand the significance of the term m1r1..