AROUND THE HOUSE WITH SIMPLE MACHINES
'(<a href="http://www.j-archive.com/media/2009-06-15_DJ_26.wmv">Sarah of the Clue Crew pulls up on a Venetian blind.</a>)  When I pull down on the cord, the blinds go up; at the top is a single fixed one of these simple machines, which reverses the direction of force'
a pulley