A Simple machine helps us do work EASIER.

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Presentation transcript:

A Simple machine helps us do work EASIER.

A simple machine has few or no moving parts. There are 6 types of simple machines.

Inclined Planes An inclined plane is a sloping surface that makes it easier to move objects to a higher or lower place. (example: a ramp)

Inclined Planes

WEDGE A wedge is a simple machine used to raise objects or split an object apart.

WEDGE A saw an ax, and a knife are wedges also.

SCREW A screw is a simple machine that is used to hold things together.

SCREW A jack is another example of a screw.

LEVER The lever reduces the amount of work needed to lift or move an object.

LEVER A wheel barrow, a hammer, a see saw, and nail clippers are other examples of levers.

WHEEL AND AXLE The wheel and axle is made up of a wheel connected to a post (called the axle). A wheel and axle help people lift a heavy load with less work.

WHEEL AND AXLE We use wheels and axles every day. Cars use wheels and axles. Doorknobs too.

PULLEY A pulley is a simple machine made up of a wheel with a rope or cable around the wheel. A pulley is used to lift heavy objects.

PULLEY A pulley is used to raise a flag on a flagpole. A ski lift uses a pulley also.

Complex machines… Simple machines can be put together to create complex machines that do all sorts of things!

Can you find any simple machines around the classroom???