Simple Machines

Lever: A lever is a stiff bar that rests on a support called a fulcrum which lifts or moves loads.

Pulley:
A pulley is a simple machine that uses grooved wheels and a rope to raise, lower or move a load.

Screw
A screw is an inclined plane wrapped around a pole which holds things together or lifts materials.

Wedge

 A wedge is an object with at least one slanting side ending in a sharp edge, which cuts material apart.

Axle:

A wheel with a rod, called an axle, through its center lifts or moves loads.

Inclined Plnae:
An inclined plane is a slanting surface connecting a lower level to a higher level.

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