Melody Wright 4th grade Power Point ECE 8842, section 4 Making Things Work Simple Machines Melody Wright 4th grade Power Point ECE 8842, section 4

Table of Contents Other Types of Simple Machines Georgia Performance Standards Types of Simple Machines Organizer Inclined Plane types of inclined planes Wedge types of wedges Levers types of levers Screws types of screws Pulleys types of pulleys Wheels and axles types of wheels and axles Other Types of Simple Machines Simple Machines in Our Homes Simple Machines at Work Pulleys and Inclined Planes Levers Resources How Do You Move a Lion? Closing Slide

Georgia Performance Standard S4P3. Students will demonstrate the relationship between the application of a force and the resulting change in position and motion on an object. a. Identify simple machines and explain their uses. (lever, pulley, wedge, inclined plane, screw, wheel and axle)

Types of Machines

Inclined Plane An inclined plane is a flat surface set at an angle to another surface. Where do you find inclined planes? How might you use an inclined plane?

Inclined Plane An inclined plane is used to make moving things up and down easier. Inclined planes are ramps, slides, and stairs; many others, too.

Wedge A wedge is two inclined planes stuck back to back. A wedge is wide at one end and tapers to a point at the other. Where might you find wedges? How might you use a wedge?

Wedge Wedges are used to separate things by cutting, piercing, or splitting the objects. Knives, doorstops, saws and scissors are all types of wedges.

Levers A lever is a bar that moves on or around a fixed point. Where do you find levers? How can you use a lever?

Levers Levers, levers everywhere! A lever is used for raising or moving heavy objects. See-saws, push bars, hammers, bottle openers, and pop-tops on soda cans are all levers!

Screw A screw is an inclined plane that curves around a pole. Where do we find screws? How do we use screws?

Screw A screw is used to hold things together. Screws are all around us! Bottle tops, bolts, and even the end of light bulbs are all types of screws!

Pulley A pulley is a rope over a wheel. It changes the direction of the force you use. Where do we find pulleys?

Pulley A pulley makes it easier to move objects up, down, and across a long distance. The more pulleys you combine, the less force you need to move an object. A flagpole is a type of pulley.

Wheel and Axle A wheel and axle is a machine that has a bar through the middle of a wheel. Where do we find wheels and axles? Why do we use wheels and axles?

Wheel and Axle When the wheel is turned, the axle turns, too. Doorknobs, tape dispensers, pencil sharpeners, and automobiles all use wheels and axles.

Other Examples of Simple Machines Inclined plane Wedge Levers Screw Pulley Wheel and axle slide kitchen knife light switch tornado slide cranes pizza cutter wheel-chair ramp doorstop broom Coke bottle top sailboat sails fishing pole

Simple Machines in Our Houses Annie’s House Anthony’s House

Simple Machines at Work Pulleys and Inclined Planes

More Simple Machines at Work Levers

Back to table of contents Resources Websites http://edheads.org http://home.earthlink.net/~kandyhig/sm/ www.harcourtschool.com/activity/machines/simple_machines.htm www.kidskonnect.com/SimpleMachines/SimpleMachinesHome.html http://www.hep.uiuc.edu/home/mats/wg2004.html Books Simple Machines by Allan Fowler The Wheeling and Whirling Around Book by Judy Hindley How Do You Lift a Lion? By Robert E. Wells (see the book cover on the next slide) Back to table of contents

Don’t you just Simple Machines?!