Simple machines in the real world.

• Machine- something that makes work seem easier by changing the size or direction of a force.

• Work – using a force to move an object a certain distance.

Who is doing more work?

Machines are: Tools we use to make work easier.

Levers Screws Wedge

Pulley Inclined Plane

Wheel and Axle

Types of machines:

Let’s Review First!!! Pulley A grooved wheel with a rope running

through the groove

Wheel and Axle A wheel with a rod or axle through center

Lever A rod or board that pivots at one end

Screw An inclined plane wrapped around a cylinder

Wedge Has a slanting side ending in a sharp edge

Inclined Plane A slanting surface

But can you recognize simple machines in the real world?

Lever

Wedge

Wheel & Axle

Wheel and AxlePulley

Screw

Screw

Lever

Pulley

Lever

Inclined Plane

Lever

Screw

Wheel & Axle

Wheel & Axle

Screw

Lever

Pulleys

Wedges

Lever

Inclined Planes

Levers

Now it’s your turn! Can you name all six simple machines from memory?

•Wheel & Axle

•Pulley

•Lever

•Screw

•Inclined Plane

•Wedge

What simple machines can be found in this compound

machine?

Assignment…

Go to www.edheads.org

From the Tab Choose an Activity… Click Simple Machines

Complete one Activity from The House and one activity from The Tool Shed, as well as one more of your choosing. Print your results.