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Simple Machine

A machine with few moving parts, making it easier to do work.


The use of force to move an object.


The fixed point on which a lever balances.


A push or pull by one object on another, causes a change in motion.


A stiff bar that balances on a fulcrum.

Examples of Levers

Seesaw (1st)
Wheelbarrow (2nd)
Tweezers (3rd)

Wheel and Axle

A large wheel that rotates on a small rod.

Examples of a Wheel and Axle

Doorknob, car wheels


A wheel with a groove in the rim and a rope, allowing the load to be lifted.

Examples of Pulleys

Flagpoles, blinds

Inclined Plane

A flat, slanted surface that allows heavy objects to be moved easily.

Examples of Inclined Planes

Bottom of a sink or bathtub
Ladder (leaned against a wall)


two inclined planes put together back to back that are used for separating things

Examples of Wedges

Ax blade


An inclined plane wrapped around a cylinder or cone that is used to fasten. The spiraled inclined plane is called "threads"

Examples of screws

Jar lids


Used to transfer motion from one part of a machine to another. The teeth push them in opposite directions.

Examples of gears

Gears next to a bike pedal

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