Here we have the common incline plane, wedge, and screw. Incline plane and wedge are used to make work easier by breaking on upward or downward movement into smaller incruments. Screws use small rotation to make a large drilling force. In inclined plane the load is the heavy object being pushed or pulled by effort which is you. In wedge the load is whatever you are splitting with the wedge which is the effort. In the screw the load is whatever you are screwing the screw into and the effort the screwdriver rotating the screw into the load.