Center of Mass of a Solid of Revolution See-Saws We all remember the fun see-saw of our youth. But what happens if . . . Balancing Unequal Masses Moral Both the masses and their positions affect whether or not the “see saw” balances. Balancing Unequal Masses M1 M2 d1 Need: M1 d1 = M2 d2 d2 Changing our Point of View The great Greek mathematician Archimedes said, “give me a place to stand and I will move the Earth,” meaning that if he had a lever long enough he could lift the