Pulley-a simple machine that uses grooved wheels and a rope to raise, lower or move a load.
Lever- a stiff bar that rests on a support called a fulcrum which lifts or moves loads.
Wedge- an object with at least one slanting side ending in a sharp edge, which cuts material apart.
Wheel and Axel- A wheel with a rod, called an axle, through its center lifts or moves loads.
Inclined Plane- a slanting surface connecting a lower level to a higher level.
Screw- an inclined plane wrapped around a pole which holds things together or lifts materials.
