January 2017 - For a project about wedges, collect as many different kinds of wedges as you can find around your house and on your block. What are the wedges made of? Try to find some thin, long wedges (like knives or nails) and some thick, short wedges (like a splitting maul). Is a zipper a kind of wedge? Why? How does friction affect the work of a wedge?
Try using a wedge to split a wooden log with a sledgehammer. What kinds of wedge work best? Why?