Simple Machines By Ashby Morell Clip Art from Microsoft Office 2007.

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Presentation transcript:

Simple Machines By Ashby Morell Clip Art from Microsoft Office 2007

Machines are tools that make tasks easier.

All machines are built using one or more simple machines.

Simple machines have very few parts. There are six types of simple machines: pulley lever wheel and axle inclined plane wedge screw

A pulley is one type of simple machine. A pulley uses a wheel and a rope to move heavy objects.

Here are some examples of pulleys.

Can you think of other examples of pulleys? Did you say either of these: A pulley that raises and lowers blinds. The pulley that raises and lowers the flag on a flagpole.

A lever is a type of simple machine. A lever uses force to move something.

Here are some examples of levers. bottle openerseesaw toilet flusher

Can you think of other examples of levers? Did you say either or these? crowbar scissors

A wheel and axle is a type of simple machine. The axle is the rod that holds the wheels together.

Here are some examples of wheel and axles. rolling pin pencil sharpener ferris wheel

Can you think of other examples of wheel and axels? Did you say any of these? bicycle skates wagon

The inclined plane is a simple machine. An inclined plane is a slanted surface that can be used to raise or lower things. An inclined plane does not move.

These are some examples of inclined planes. wheelchair ramp boat ramp hatchet

Can you think of other examples of inclined planes? Did you say any of these? dump truck ladder roller coaster

A wedge is a type of simple machine. A wedge is two inclined planes that are back to back. The difference between an inclined plane is that it does its work by staying still, while a wedge moves. Wedges hold things together or split things apart.

These are some examples of wedges. A fork and a knife screwdriver golf club

Can you think of other examples of wedges? Did you say any of these? nail teeth ship

A screw is a type of simple machine. A screw is an inclined plane that is wrapped around a cylinder with a flat head on one end. This head is used to turn or drive the screw into something.

These are some examples of wedges. swivel stool bottle lids corkscrew

Can you think of other examples of screws? Did you say any of these? door lock light bulb clamp

As you can see, our world is made up of many simple machines. You can find examples any place you look. Simple machines solve the problem of how to do work faster and easier. Maybe you can invent a machine that will make some job faster and easier.