Pulleys By: Sydney and Constance

A pulley is a wheel with a groove. A rope fits in the groove.  A single fixed pulley is attached to the load instead of any other object.  This type of pulley changes the direction the load moves.  The groove helps heep the rope or chain in place.  As you pull the rope, the wheel turns. Moveable pulleys making lifting things easier. Moveable pulleys are often used with fixed pulleys. A flagpole has a single fixed pulley. Pulling down on the rope raises the flag. Moving the rope in the opposite direction  lowers the flag. As you pull the rope, the wheel turns. Using a pulley you can pull very heavy objects and it seems easier.
A single fixed pulley is attached  to an object. This type of pulley changes the direction a load moves. Moveable pulleys are attached to the load  instead of an other object.