Falling Objects

Falling objects.  Ask students which falls to the ground faster: a set of keys or an un-crumpled sheet of paper.  Of course the keys fall faster because they have little drag from air friction.  Now crumple the paper into a ball and ask again which falls faster. The objects are the same size but of very different mass.  Without drag they fall the same.  Mass has no effect.  Talk about “weightlessness.”