2. Wedges A wedge is a item that you cut with. A wedge are two inclined planes.

3. Pulley A fixed pulley is attached to a item that cannot change position. Plus you pull down for the effort force.

4. Levers A first-class lever has the fulcrum is in the middle and you push down and the load goes up. In a second-class lever has the fulcrum at the end and the load is on the center plus you pull up. A third-class lever has the fulcrum at the end the load is at the other side and the effort force is on the middle.

5. Screw A screw sticks to pieces of wood together. Plus it is a twisted inclined plane. It helps us by making shelter and tools.

6. Inclined plane A inclined plane is a slanted surface. It helps by loading goods on a truck.

7. Wheel and axle A wheel and axle is two parts one part is a wheel the other part is a rod that passes through the center. When the wheel is twisted the axle twist and it can open a door.