[math-fun] And I suppose heavy objects fall faster than light ones?

From http://www.nytimes.com/2008/04/29/science/29nuke.html

Why do the contents separate? As Newton explained in his second law of motion, the more massive the object, the greater the tug. In the lurching car, an adult feels the force more than a child. In the centrifuge, heavy objects feel it more than light ones and, if possible, they move more vigorously toward the outer wall.