Wedges

• A wedge is a item that you cut with.

• A wedge are two inclined planes.

Pulley

• A fixed pulley is attached to a item that cannot change position.

• Plus you pull down for the effort force.

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.

Screw

• A screw sticks to pieces of wood together. Plus it is a twisted inclined plane.

• It helps us by making shelter and tools.

Inclined plane

• A inclined plane is a slanted surface.

• It helps by loading goods on a truck.

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.