Simple Machines

What are the simple machines?

Inclined Plane

• An inclined plane is a slanting surface that connects a lower level to a higher level.

• Examples: a wheelchair ramp and a slide

How does an inclined plane help us do work?

• Inclined planes let you use less force to do work

• For example, instead of lifting the box straight up into the truck, Moby can use the ramp. It lets him use less force by spreading the work out over a long distance.

Wedge

• A wedge is often made from two inclined planes put together.

• Examples: a doorstop, a knife, your front teeth

How do wedges help us do work?

• A wedge uses force to split objects apart • For example, an axe lets us split things apart

easily.

Your teeth help you break your food apart.

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